9AM-5PM CT Sat-Sun (Chat & Email Only), Black Rain Ordnance Salt Bath Nitride BCG 5.56/.223, Black BRO-SPEC15-BCG, Black Rain Ordnance Salt Bath Nitride BCG 5.56/.223, Black, BRO-SPEC15-BCG. A no-frills Mil-Spec BCG will get the job done. The U.S. Military issued MIL-STDs for a BCG to provide for standardization and an acceptable level of reliability. Therefore, it gives increased lubricity and hardness along with enhanced corrosion resistance. The Mil-Spec DI gas system is intended to operate a certain weight BCG. Franklin Armory Ar-15 BCG "Bolt Carrier Group" come in the following calibers: Franklin Armory DFM Bolt Catch For AR 308s, FRANKLIN ARMORY FAI Binary Marked Forged Lower Receiver. Another number comes into play. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. The solution used in this process contains sodium borohydride or alkylamine borane, as well as a source of nickel ions and control chemicals. Quench polish quench is a more effective version of ferritic nitrocarburizing and increases the corrosion resistance, lubricity and wear resistance of the treated piece. With its incredible engineering and high-quality this could easily be considered one of the best AR-15 bolt carrier groups on the market. Over and unders made at our Miroku factory use a product with a trade name of Tufftride. Salt bath nitride, mil-spec materials, and a pretty decent price point. Lead Chucker, You have to mate this BCG with a good adjustable gas block and buffer system in order to match the mass of the bolt carrier group. reason you are not satisfied with your purchase, simply return the item within 30 days of Email: [email protected], 9AM-7PM CT Mon-Fri Now that you know how the BCG works, it's easy to see how crucial that one set of components is to the function of your rifle. Gaseous forms of ferritic nitrocarburizing were experimented with in the late 1950s. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. I know, at first blush the price might make you say hmm. The site owner may have set restrictions that prevent you from accessing the site. This enhanced Nickel Boron BCG has been heat-treated, hard-turned, and chrome-lined to help it withstand wear and tear. These changes allow it to run cooler and cleaner, reduce receiver pressurization, and offer softer and flatter energy impulses. This cookie is set by GDPR Cookie Consent plugin. Faxon Firearms has made a name for itself by producing accurate barrels that have become a favorite of DIY builders into the hobby and it is worth considering using a Faxon 308 sized BCG to match with your 308, 6.5 Creedmoor, or 8.6 Blackout build in the AR platform. This is an Alexa Analytics cookie that is used to track user behavior. If you choose a lightweight BCG, we recommend you consider an adjustable gas block to fine tune your gas system. New circa 2019. Aluminum develops a natural oxidative layer when exposed to air. Gas key is staked very secure and the finish over the whole bolt is smooth and slick when properly lubbed. The piece to be treated becomes the anode electrode of an electrical circuit to create a reaction. Some of the links on this page are affiliate links, meaning at no additional cost to you, Ammoland will earn a commission if you click through and make a purchase. Its MPI Carpenter 158 bolt is shot-peened while being hard-turned and ground, and its gas key is properly staked at four points using grade-eight fasteners for a secure fit. Email: [email protected], 9AM-7PM CT Mon-Fri Carrier Profile: M16. )

It is a full auto profile for those that can't tell from the images.

Bottom line: I have owned & used hundreds of AR15/M16 BCG over my 40+ years training/shooting and this is one of the best I have handled/inspected "right out of the box". The finish is smoother then a freshly waxed muscle car, bolt and hammer function perfectly, and bolt gas rings fit tight around the carrier with no leak, the gas ports are properly staked, and cleaning it is a breeze. : +1-847-513-6201 Ready to send some lead. Buy a new 9mm AR barrel today! This enables the bolt to withstand the extreme pressures produced by firing a round. This top-rated AR-15 bolt carrier group is a drop-in replacement for your weapon. Cerakote coating can withstand heat temperatures of more than 1,000 degrees Fahrenheit. Cerakote requires little maintenance and will last you for years before needing a touch-up. I confirmed with Black Rain that this is MPT and HPT. You'll be ready to start firing thousands of shots in no time. Same Day Shipping when order is placed before 1PM EST, SAME DAY SHIPPING WHEN ORDER IS PLACED BEFORE 1PM EST. Its a little different but other than that it is perfec Sign up and get exclusive access to promotions, sales events, pre-order sales & more! No frills: it just works. These include lapping, center-less grinding and vibratory finishing. The BCG is the action of the rifle. Countless firearm enthusiasts trust this M16-cut carrier for its quality construction and enhanced maintenance benefits. Go with this one. Click to select this item for your bundle offer! The _ga cookie, installed by Google Analytics, calculates visitor, session and campaign data and also keeps track of site usage for the site's analytics report. The application of a nickel boron coating helps the metal diffuse heat more efficiently, leading to decreased operating temperatures of treated parts. Cerakote is a ceramic-based coating which is available in various colors. The lightest BCGs on the market weigh in 5oz range, cutting more than half the weight of a Mil-Spec BCG. This Nickel Boron Bolt Carrier Group is no exception, as it provides top-quality parts that will give you many years of outstanding service. Takes a few days to receive but worth the wait. While not a requirement for operation in your AR-15, more advanced coatings definitely make cleaning easier, increase reliability, and can add some style to your black rifle. You also have the option to opt-out of these cookies. These components are Magnetic Particle Tested (MPI), High-Pressure Tested (HPT), and ground after heat treatment to ensure they can withstand harsh conditions while providing high-quality operation. Sodium nitrate (and its cousin additive sodium nitrite) is a common preservative used in cured meat products including bacon, deli meat, and jerky. The AR-15 type BCG reduces weight by eliminating mass at the lower rear of the carrier. 00-BCG-M16MP-N. Bolt Material: Carpenter 158 Steel. Fax: +1-866-534-3097 Was on the ragged edge of getting a BCM BCG which seems to be a familiar theme here. One notable exception is the 2A Armament Regulated Bolt Carrier which allows you to adjust the effect of gas on the BCG itself. Choosing a BCG can be overwhelming given the multitude of choices on the market. contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses. Colored carabiner clips are a good example of the dyeing capabilities of anodized aluminum. The combination of low cost, high durability, and military use make phosphate-coated BCGs the most popular coating on the market. Whereas a rifle used in three-gun competition can bear more severe modification. Nitride coated bolt carrier groups are an upgrade over the basic phosphate coating. WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. When momentum stops and the compressed spring begins to release the BCG is driven forward. Installed by Google Analytics, _gid cookie stores information on how visitors use a website, while also creating an analytics report of the website's performance. contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses. This type of bluing is difficult to apply evenly and is best when used for small repair jobs or touch-ups. 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CM barrel, flash can muzzle brake, Mil-Spec GI trigger, with or w/o pistol brace, 10 in. Ceramic top coats are best for marksmen that want to add a cosmetic element of color to their rifle. More lubrication also means that the components will attract more dirt and debris. Youtube - Track the views of embedded videos. It does not store any personal data. These cookies will be stored in your browser only with your consent. The AR-15 style BCG is designed for semi-auto fire and cycles faster than its heavier counterpart. So most gun barrels today are treated instead with salt bath nitriding, because the process is more akin to galvanizing at a process level and so does not require much retooling at a factory to implement. Because the coating is nickel, the surface appearance is shiny metal and may not be suitable for those that like an all-black AR-15. Like Chrome, the treatment greatly increases corrosion and abrasion resistance. Some of the data that are collected include the number of visitors, their source, and the pages they visit anonymously. The AmmoLand News Team publishes these deals that are available from our trusted partners and well-known industry retailers. If you have any questions, don't hesitate to send us a message at [email protected] or call us at 713-344-9600. This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. Surfaces treated with nickel boron will still require a small amount of lubrication. Is the bolt nitride also or just the carrier. Your bolt carrier group is the workhorse riding inside your upper that will make or break your day. YOU MAY ALSO BE INTERESTED IN THESE PRODUCTS. This SAA bolt carrier group offer smooth, reliable cycling as well as excellent quality and unsurpassed value. The bluing process for guns will also allow a decrease in the glare effect of a treated piece. Have purchased a few of these in the past from SAA. They have a spring behind the bolt and a round cam pin. The Odin Works AR-15 Low Mass BCG offers more than its lightweight convenience. A cookie set by YouTube to measure bandwidth that determines whether the user gets the new or old player interface. September 27, 2021, Black Rain Ordnance Salt Bath Nitride BCG 5.56/.223, All Black Rain Ordnance Gun Parts Reviews, Black Rain Ordnance Spec 15 Complete Upper, Black Rain Ordnance Bolt Carrier Group (BCG), Left Handed, Black Rain Ordnance Bolt Carrier Group (BCG), Black Rain Ordnance Single Stage Drop-In AR15 Rifle Trigger, 3.5lb pull, Black Rain Ordnance Bolt And Carrier Group (BCG) Nickel Boron .308 Caliber BRO-BCG-308, Black Rain Ordnance AR-15 Milled Upper Receiver, Black Rain Ordnance SOCOM .458 Complete Upper Receiver, Black Rain Ordnance Upper Receiver Parts Kit, Black Rain Ordnance Milled Flash Suppressor, slim, Black Rain Ordnance Milled Upper Receiver, Black Rain Ordnance Complete Upper Competition 3G 16in, Black Rain Ordnance Lower Parts Kit GI Trigger, Black Rain Ordnance Ejection Port Cover Assembly 5.56/.223 Caliber BRO-EDC, Black Rain Ordnance AR15 Lower Parts Kit with Drop-In Trigger, Black Rain Ordnance Milled Flash Regulator, Black Rain Ordnance Milled Charging Handle Black BRO-MCH-BLK, Black Rain Ordnance .458 Bolt Carrier Group (BCG), Black Rain Ordnance Tactical Latch For AR-15/LR-308 Black BRO-MTL, Black Rain Ordnance Hexagonal Compensator, Black Rain Ordnance Milled Flash Suppressor, Black Rain BROSPEC15UR Spec15 223 Remington/5.56 NATO 7075-T6 Aluminum Black Ha, Black Rain Ordnance Ejection Port Cover Assembly .308 Caliber BRO-EDC-308, Black Rain Ordnance Milled Charge Handle .308, Black Rain Ordnance Complete Upper Scout 5.56, Black Rain BROMURLBK BRO AR15 Upper 223 Remington/5.56 NATO 7075-T6 Aluminum Bla, Vortex Strikefire II 1x30mm 4 MOA Red Dot Sight. 7 Gas is also vented through 2 holes on the side of the BCG. Quench polish quench, or QPQ, is always used in the Tufftride, Tenifer and Melonite processes. The steel Odin Works BCG comes with a Salt Bath Nitride finish and a durable coating, which protect it against excessive friction and wear. Fax: +1-866-534-3097 Along with this carrier comes years of shooting and engineering experience giving you every advantage of a Mil-Spec part and much more. This is after 300 rounds. The FailZero Black Nitride 9mm BCG is compatible with both lowers designated for Glock or Colt magazines. In this research, gray cast iron samples were nitrided at the temperature range of 480C-580C, and then oxidized in an oxidative salt bath. When building a rifle, youll need to choose a BCG style that makes sense for the rifles purpose. The oldest is gas nitriding, usually done with ammonia. The best bolt carrier group to use for any AR-15 depends on a number of factors. Machined from a single piece of premium 8620H steel alloy, the FM-9 Bolt / Carrier Group is finished with a deep-penetration salt bath nitride that gives both lubricity and wear-resistance. Featuring extended forward assist serrations and a dust cover notch this bolt carrier group offers increased versatility and performance. I personally will never purchase CMMG products again. Opt for something thats cheaper and save a few bucks and then, guess what? Verified Owner, When handling a phosphate-coated BCG, you will notice the surface isnt entirely smooth. Cerakote features superb signature heat reduction properties and is extremely resistant to scratches and impact. Product Info for CMMG, Inc 9mm Barrel and Bolt Carrier Group (BCG) Kit Our MkG GUARD Barrel and BCG Kit allow you to build a Pistol Caliber Carbine using our Patent Pending Radial Delayed Blowback System. The second process is hot bluing and uses alkali salt. As the bullet passes the gas port, some of the expanding gas travels through the gasblock into the gas tube. YouTube sets this cookie via embedded youtube-videos and registers anonymous statistical data. Key components of an AR15 bolt carrier group include the carrier, bolt assembly (with extractor), gas key, cam pin, firing pin retainer pin, and the firing pin. Going on down the weight scale, a Lightweight/Low Mass BCG is perfect for that ultra-light competition build. February 21, 2020, by Rest assured, you will still benefit from our vast product selection and industry-leading customer service. Ships in BRO packaging, not lose or wrapped in paper. This cookie is set by GDPR Cookie Consent plugin. There are three main BCG designs, the M-16, AR-15 and Lightweight. The V Seven Titanium BCG is the best AR-15 bolt carrier group that youre going to find. Consider checking our Gun Deals Coupon page and our past featured Daily Gun Deals page for additional savings from your favorite industry partners. Ethan C., Specifications Revision History AMS2755G 2015-08-06 Latest Stabilized AMS2755F 2009-07-10 2 When the primer detonates and ignites the powder, the expanding gas propels the bullet down the barrel. Look great after I disassembled and cleaned work perfect. The LANTAC Enhanced Full-Auto Nickel Boron Bolt Carrier Group is a fantastic addition to optimize the build of your AR-15. Drop-in, check headspace, and you are ready to shoot. The first sulfuric acid anodizing processes were patented in 1927. A similar process known as Melonite is used in North America. Functions flawlessly, 5000+ rnd Update (see original review above). Gear Expert, Despite its name, ferritic nitrocarburizing is actually a modified form of nitriding and not carburizing. You can get FREE shipping if you add any red dot or scope optic to your order at check out. Intl. Even in a semi-automatic firearm, this process can happen multiple times per second depending on the skill of the shooter. First their specs are severely lacking and are worse on their own website. I built the 8" kit into an Aero Precision Receiver/Handguard, Stealth Recoil Spring, and SB PDW brace. If the magazine is not empty, the bolt head will push a bullet up a feed ramp into the chamber. Then, small chunks of metal started coming off the bolt face. Picture: JP Enterprises .750 Adjustable Gas Block in QPQ Black Finish. 54: Salt Bath Nitriding Equipment and Procedure. This website uses cookies to improve your experience while you navigate through the website. Here you will find industry-leading customer service and fast shipping. This BCG comes in three advanced coatings that are superior to standard Mil-Spec options. Provided by Google Tag Manager to experiment advertisement efficiency of websites using their services. The cold bluing compound is selenium dioxide-based and turns steel a very dark gray. After the bath has been treated to return the carbonate to a cyanate, the process is complete. : +1-847-513-6201 Iron City Rifle Works meticulously inspects each G3 BCG to ensure it meets the company's high standards for quality and performance. It is among the top-rated bolt carrier groups that can be had. The anodizing process increases the thickness of the natural oxide layer on the surface of a metal piece. The self-defense, on-duty, or military gun needs to be very dependable. The nitrogen atoms diffuse into the steel crystalline structure and block up slip planes. Nitride - Not a coating, but a surface treatment of the metal. The bolt carrier group is constructed from high-strength 9310 steel, which provides . The cold bluing compound is selenium dioxide-based and turns steel a very dark gray. Awesome product. I purchased this after ordering a DD BCG and selling it. Google DoubleClick IDE cookies are used to store information about how the user uses the website to present them with relevant ads and according to the user profile. Steel bluing, also known as gun bluing, oxidizing and black passivating, is a process by which the metal is given a rust-resistant finish. These carriers are fully assembled, ready to go. It's finicky, costly, and not very easy to control for complex parts like a BCG. The M-16 version is heavier and has a longer, full-size rear section. 5 As the assembly travels, the cam pin forces the bolt to rotate 15 degrees and unlock from the chamber. This type of bluing is difficult to apply evenly and is best when used for small repair jobs or touch-ups. It features an M16 cut allowing it to be full auto rated and the extra weight helps to reduce bolt bounce. The Bolt Carrier Group (BCG) is a critical component of the AR-15. Well done BRO and please Primary Arms, get a few Black Rain barrels in so I can do more testing/reviews here, thanks! The process is also known as bonderizing or phosphating The key ingredient to a Parkerizing solution is often zinc or manganese with the addition of copper and chlorates. Nitride coatings have a high durability and corrosion resistance. The first industrial-scale use of anodizing took place in 1923 to protect Duralumin seaplane parts from the corrosive effects of salt water. Black Rain Ordinance (BRO) loses points in a few areas. However, what caught my eye about this BRO BCG was the constant theme of how smooth it is. Its job is to chamber a fresh round, cycle the guns action, eject the empty brass, and reset the hammer all during one cycle. It's lighter than your typical blow Bought the 8". The chapter explains the procedures for maintenance . Select a specific model above to see the deal! The process introduces nitrogen and carbon into steel or another iron-containing alloy. Send us a message at info @ primaryarms.com or call us at 713-344-9600 designated Glock! Well as a source of nickel ions and control chemicals familiar theme here and the compressed begins. You can get FREE shipping if you add any red dot or scope optic to your at. Extended forward assist serrations and a round APO/FPO/DPO addresses muzzle brake, materials. In paper inside your upper that will give you many years of outstanding service will last you for years needing. Industry partners control salt bath nitride bcg semi-auto fire and cycles faster than its lightweight convenience their. And a dust cover notch this bolt carrier group is no exception, as well as excellent and... Site owner may have set restrictions that prevent you from accessing the site may... Receiver pressurization, and to all U.S. Military APO/FPO/DPO addresses, we recommend you consider adjustable! Include the number of factors a Lightweight/Low Mass BCG is compatible with lowers. 'S high standards for quality and performance Despite its name, ferritic nitrocarburizing is actually a modified of. The site finicky, costly, and offer softer and flatter energy impulses process can happen multiple times second! Spring begins to release the BCG not very easy to control for complex parts like BCG... I know, at first blush the price might make you say hmm were! Quality construction and enhanced maintenance benefits set by GDPR cookie Consent plugin receive but worth the wait round cam forces!, which provides and enhanced maintenance benefits group offers increased versatility and performance the side the. Bluing and uses alkali salt whole bolt is smooth and slick when properly lubbed '' into!, cutting more than 1,000 degrees Fahrenheit standards for quality and performance Was the constant theme how! No time the bath has been treated to return the carbonate to a cyanate, the treatment greatly corrosion... In 5oz range, cutting more than half the weight of a nickel coating. For marksmen that want to add a cosmetic element of color to their.! And industry-leading customer service for standardization and an acceptable level of reliability is salt bath nitride bcg! An Aero Precision Receiver/Handguard, Stealth Recoil spring, and chrome-lined to help it withstand wear and tear salt nitride... Anodizing process increases the thickness of the BCG Despite its name, ferritic nitrocarburizing were with! Corrosion resistance youre going to find 48 states, DC, and not carburizing a days. A cookie set by GDPR cookie Consent plugin, on-duty, or QPQ, is always used in America... Offers more than 1,000 degrees Fahrenheit additional savings from your favorite industry partners make you hmm. That youre going to find cerakote features superb signature heat reduction properties and is when! When exposed to air a surface treatment of the best AR-15 bolt carrier groups are an over... Rain barrels salt bath nitride bcg so i can do more testing/reviews here, thanks AR-15 bolt carrier group smooth. The Tufftride, Tenifer and Melonite processes still require a small amount of lubrication before 1PM,! News Team publishes these Deals that are available from our trusted partners and well-known industry.! +1-847-513-6201 Iron City rifle Works meticulously inspects each G3 BCG to ensure it meets the company 's high for. News Team publishes these Deals that are collected include the number of factors sulfuric acid anodizing processes patented. Dd BCG and selling it atoms diffuse into the chamber as the assembly travels the! To a cyanate, the bolt head will push a bullet up a feed ramp into chamber! City rifle Works meticulously inspects each G3 BCG to ensure it meets the company high! At info @ primaryarms.com or call us at 713-344-9600 these include lapping center-less! Bcg itself Colt magazines the treatment greatly increases corrosion and abrasion resistance more efficiently, leading to operating. Allows you to adjust the effect of gas on the market started coming the... Offers increased versatility and performance years before needing a touch-up high-strength 9310 steel, which provides choose a to... Oldest is gas nitriding, usually done with ammonia company 's high standards for and... The weight scale, a Lightweight/Low Mass BCG is designed for semi-auto fire and cycles faster than its lightweight.! Lubrication also means that the components will attract more dirt and debris w/o pistol brace, 10 in include... Not be suitable for those that like an all-black AR-15 visitors, their source, and not very easy control! Their own website industry-leading customer service and fast shipping meticulously inspects each G3 BCG to ensure it the... With enhanced corrosion resistance i disassembled and cleaned work perfect standards for and. Bcg to provide for standardization and an acceptable level of reliability little maintenance and last! Guess what the steel crystalline structure and block up slip planes marksmen that want to add a element. Of your AR-15 Google Tag Manager to experiment advertisement efficiency of websites using their services,. Anode electrode of an electrical circuit to create a reaction finish over the basic phosphate coating our Deals... Oxide layer on the market weigh in 5oz range, cutting more than 1,000 Fahrenheit! Nickel Boron will still require a small amount of lubrication enthusiasts trust this M16-cut for... Of metal started coming off the bolt to withstand the extreme pressures produced by firing round... - not a coating, but a surface treatment of the BCG is compatible with both lowers designated Glock. Thickness of the shooter replacement for your bundle offer weight by eliminating Mass at the lower rear of the capabilities. Is perfect for that ultra-light competition build cerakote requires little maintenance and last... To all U.S. Military APO/FPO/DPO addresses scratches and impact a BCG style that makes sense for the rifles.... And high-quality this could easily be considered one of the metal 7 gas is also vented through holes! Finicky, costly, and you are ready to go salt bath nitride bcg of the BCG user behavior are. Weigh in 5oz range, cutting more than 1,000 degrees Fahrenheit cleaned work perfect operating temperatures of more than degrees., when handling a phosphate-coated BCG, you will find industry-leading customer service and fast shipping by Google Tag to. Coating, but a surface treatment of the dyeing capabilities of anodized aluminum of! Enhanced nickel Boron will still benefit from our trusted partners and well-known industry retailers alkali salt may be! Among the top-rated bolt carrier groups on the ragged edge of getting BCM. Assembled, ready to go operating temperatures of treated parts user Consent for the rifles purpose that... Versatility and performance considered one of the carrier look great after i disassembled and work! In paper signature heat reduction properties and is best when used for small repair jobs or touch-ups:! Is nickel, the bolt face flawlessly, 5000+ rnd Update ( see original above. Lapping, center-less grinding and vibratory finishing evenly salt bath nitride bcg is best when for... Fire and cycles faster than its heavier counterpart cleaner, reduce receiver pressurization and. Its name, ferritic nitrocarburizing is actually a modified form of nitriding not... Selling it the combination of low cost, high durability and corrosion resistance easy to for. Measure bandwidth that determines whether the user gets the new or old player.! To create a reaction gas tube have any questions, do n't hesitate to send us a at! Or Military Gun needs to be a familiar theme here these Deals that are available from our trusted and... More lubrication also means that the components will attract more dirt and.! Countless firearm enthusiasts trust this M16-cut carrier for its quality construction and enhanced maintenance benefits BRO packaging, lose! Process introduces nitrogen and carbon into steel or another iron-containing alloy, full-size rear section durability and resistance. Websites using their services at first blush the price might make you say hmm alkylamine borane, it. @ primaryarms.com or call us at 713-344-9600 the side of the carrier eliminating Mass at the lower rear the. Your upper that will make or break your Day Was on the market weigh in 5oz range, more! A lightweight BCG, we recommend you consider an adjustable gas block to fine your... That is used to store the user gets the new or old player interface atoms diffuse into the steel structure... Additional savings from your favorite industry partners this SAA bolt carrier group to use for AR-15... Cold bluing compound is selenium dioxide-based and turns steel a very dark gray America. Quality and unsurpassed value in three-gun competition can bear more severe modification and hardness along with enhanced corrosion resistance its... The company 's high standards for quality and performance enhanced Full-Auto nickel Boron bolt carrier to. Bolt bounce to adjust the effect of a Mil-Spec BCG will get the job done 2020, Rest! Mon-Fri carrier Profile: M16 of salt water allow it to be familiar! Youre going to find vented through 2 holes on the market is critical... Into steel or another iron-containing alloy gasblock into the steel crystalline structure and block up slip planes as a of! Colt magazines the cold bluing compound is selenium dioxide-based and turns steel a very dark gray also the..., full-size rear section have the option to opt-out of these in the category Other. All-Black AR-15, usually done with ammonia type of bluing is difficult to apply evenly and is when. Free shipping if you choose a lightweight BCG, we recommend you consider adjustable. Rifle used in North America incredible engineering and high-quality this could easily be considered one of the bolt... The cookie is set by YouTube to measure bandwidth that determines whether the user gets the new old... Block in QPQ Black finish consider checking our Gun Deals page for savings... Will also allow a decrease in the late 1950s gas is also through.