Bolt Carriers Gun Parts
(367 deals total)

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6 hours ago
Quick Overview SKU: 5165449729 UPC: 5165449729 MFR#: 5165449729 Nickel Boron Finish Milspec Carpenter No. 158® steel bolt Shot Peened Bolt High pressure tested Mag particle inspected Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Steel Extractor Extractor Spring Extractor O-ring Insert ToolCraft Logo PA-15 Engraving ToolCraft Premium Carpenter 158 BCG with Nickel Boron coated finish.  BCG has the ToolCraft Logo and PA-15 engraved on to the side of the BCG. SKU: 5165449729 UPC#: 005165449729
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8 hours ago
078-102-008WB M16 Bolt Carrier Group 6.8mm SPC/224 Valk Nitride Cartridge: 6.8mm Special, 224 Valkyrie Finish: Black Nitride Description Specs An Ideal Bolt Carrier for a Special Cartridge The Brownells M16 6.8 SPC Bolt Carrier Group offers premium performance for AR-15-style rifle chambered in the unique 6.8 SPC cartridge, ensuring reliable and durable service.
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Brownells 1900
9 hours ago
With a reputation for precision manufacturing, KAK Industry offers quality, American made components at affordable prices. The KAK Industry AUTO 7.62x39mm bolt carrier group is machined to match MIL-SPEC M16 bolt carriers for the greatest reliability, as well as compatibility with registered auto sears. The bolt face has a standard .125" depth for use with the popular 7.62x39mm cartridge. Features: - 7.62x39mm bolt face - M16 cut bolt carrier - Magnetic particle tested - Durable military phosphate finish - Forward assist serrations - Correct auto sear trip location
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10 hours ago
NOTE: All BCM bolt carrier groups are factory test fired. The BCG may show handling marks consistent with these quality control procedures. The Bravo Company Manufacturing Bolt Carrier Group, with a parkerized exterior and chrome lined carrier interior, has been machined to USGI specifications. This M16/M4 carrier includes a properly staked gas key which has also been chrome lined, heat treated per MIL-SPEC, and secured to the carrier with grade 8 fasteners. Features: - MIL-SPEC carpenter no. 158 steel (bolt) - High pressure tested and magnetic particle inspected
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13 hours ago
Featuring our new Right To Bear Lightweight carrier, weighing in at approximately 6.8 Ounces, or 194.1 Grams for you lightweight build fanatics! Using our low mass Carrier creates less reciprocating mass moving back and forth inside the action, which reduces recoil significantly. Our lightweight carrier also allows proper cycling with less gas. When used in conjunction with an adjustable gas block & reduced power buffer spring, you can tune the gas way down, which will reduce muzzle rise and carbon build up.
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1 day ago
LANTAC USA manufactures the highest quality accessories for AR-15/M16 pattern rifles. Precision made in the U.S.A., rifles, muzzle brakes and more. The Enhanced Bolt Carrier Group is precision machined from 8620 Steel with a shot peened bolt manufactured from Carpenter 158. The entire carrier assembly is electroless nickel boron coated for lubricity and corrosion resistance.
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2 days ago
Our Stag 10 Left Handed QPQ Nitride Bolt Carrier Group is designed to work with any rifle, upper half, or barrel designed for left hand ejection in .308/6.5 Creedmoor. QPQ, or Quench polish quench, is a specialized type of nitrocarburizing case hardening that increases corrosion resistance. Compatible with Stag Upper Receivers. Specs Coating: BLACK NITRIDE Bolt carrier material: 8620 steel Bolt: Left-Handed Bolt assembly Included parts: Bolt carrier, bolt assembly, cam pin, firing pin, and firing pin retaining pin Design: carrier with a shrouded firing pin
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2 days ago
United Defense LR-308 Nickel Boron BCG + Charging Handle  **Fits All .308 Win, 6.5 Creed, .243 Win**  **Optional: Add an LPK to your Combo** Bolt Carrier Group Has Ultra High Polished Nickel Boron Finish !! This DPMS Standard Compatible .308 LR-308 Bolt Carrier Group Nickel Boron PW1 Coated. Fits All LR-308 Platform Rifles Chambered In 6.5 Creedmoor, 308 Win , 243 Win & All Simmular Based Calibers. Fully assembled and ready to drop into your 308 Build. Carrier is made with 8620 hardened steel 
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4 days ago
SKU: 5165457996 UPC: 810022933268 MFR#: TCFA-0245569310 PSA Custom DLC Coated 5.56 Full Auto Bolt Carrier Group, Dark Earth - 5165457996 Caliber: 5.56 NATO / .223 Remington Bolt: Carpenter No. 158 Steel Coating: DLC Color: Dark Earth HPT: Yes
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6 days ago
AO Precision Premium Mil-Spec Phosphate Bolt Carrier Group - 158 HPT/MPI BCGThese Military surplus 158 Bolt carrier groups are manufactured by AO Precision to the exacting standards of the US Military. AO makes these HPT / MPI BCG's for other Military contractor juggernauts, such as FN America. All bolts are rigorously inspected and are individually High Pressure Tested and then go through a Magnetic Particle Inspection.
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6 days ago
100-039-478WB M16 Bolt Carrier Group 7.62x39 Nitride MP Cartridge: 7.62 x 39 mm Finish: Black Description Specs This is a Nitride QPQ 7.62x39 Bolt Carrier group fully assembled and ready to drop into your rifle. Everything on this Bolt Carrier Group is machined complete all to Mil-Spec standards and hardened to USGI Specifications. - 8620 Steel Carrier Nitride QPQ - 9310 Arc-Vac Steel 7.62x39 Bolt Nitride QPQ - Tool Steel Extractor Nitride QPQ - 4140 Steel Gas Key Nitride QPQ - 4340 Steel Cam Pin Nitride QPQ - Gas Key is staked to Mil-Spec Standards
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Brownells 1277
6 days ago
Your bolt carrier group is one of the most critical parts of your build. Don't buy an imitation. This is the same BCG Spike’s uses on their builds. These complete bolt carrier groups come magnetic particle inspected and high pressure tested. The carrier is made from 8620 steel and the bolt from no. 158 carpenter steel. The gas key is properly staked, the extractor spring has been upgraded with an O-ring for increased tension, and all surfaces are MIL-SPEC heavy phosphate coated or internally chrome lined.
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1 week ago
This 9mm BCG is perfect for your 9mm Pistol Caliber AR-15 Build. Due to the increased rearward velocity, blowback AR systems require a heavier carrier. This AR9 Colt pattern bolt comes in at 14.8 ounces, providing the correct weight needed to tame your blow back system. This BCG works great with any Colt style 9mm rifle and Colt pattern magazines. We highly recommend Metalform mags, which you can purchase here Colt Compatible USA made 8620 Steel Carrier Construction Phosphate Finish Heavy Firing Pin Retaining Spring 14.8 oz. SKU#: 9MM-BCG-C-PH
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1 week ago
With a reputation for precision manufacturing, KAK Industry offers quality, American made components at affordable prices. The KAK Industry AUTO .458 SOCOM bolt carrier group is machined to match MIL-SPEC M16 bolt carriers for the greatest reliability, as well as compatibility with registered auto sears. A durable salt bath nitride finish has been applied for easy cleaning and long term durability. The bolt face has been expanded to .472" for use with the popular .458 SOCOM cartridge. Features: - .458 SOCOM bolt face - M16 cut bolt carrier - Magnetic particle tested
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1 week ago
This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec M16, M4 or AR15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides permanents dry lubricity, extreme durability, increase wear and corrosion resistance. Our patented Nickel Boron coating will reduce friction and improve the overall performance of your rifle. Nickel Boron treated parts include: Bolt & Extractor (5.56/.223 compatible) Bolt Carrier Extractor Cam Pin Carrier Key Firing Pin Product Code: FZ-01428
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1 week ago , by Dealer
9MM BOLT CARRIER GROUP Complete, drop-in carrier/bolt assembly is ramped on the bottom to provide clearance for a factory .223/5.56mm hammer in your 9mm conversion. Eliminates the need to install a dedicated 9mm hammer, so the original fire control system stays intact for easier conversion back to original caliber. Precision machined from high-grade ordnance steel, the one-piece design combines bolt and carrier as a single unit to provide outstanding strength, durability, and reliability. Includes a staked-on carrier key. AMBIDEXTROUS CHARGING HANDLE
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1 week ago
Quick Overview free shipping Free Shipping applies to this item only and not the entire order. SKU: 5165450395 UPC: 5165450395 - Caliber: 7.62x39mm - Carrier Material: 4140 Hammer Forged Steel - Carrier Coating: Black Oxide - Piston Material: 416 Stainless Steel - Overall length: 13.5" - Weight: .93 lbs - Piston Attached to Carrier with Rivet All Parts are Proudly Made in the USA
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1 week ago
Aero Precision's .308 / 7.62 Bolt Carrier Group is the perfect firing mechanism for your big-bore rifle build.
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1 week ago
Finish your AR-10 build or upgrade your old one with the Guntec USA .308 bolt carrier group. This BCG is designed for tough use with its hardened steel bolt, firing pin, and extractor that won't break under stress. The carrier is made from 8620 steel and has a Nickel Boron coating that is harder than chrome and more slick allowing you to shoot longer between cleaning. It also makes cleaning easier as the carbon buildup will simply wipe off. The gas keys are also properly staked to ensure it won't back out over time.
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2 weeks ago
M16 Full Auto Style for increased mass and lock time.Lantac's new TiN E-BCG is precision machined from 8620 Steel with a shot peened bolt manufactured from Carpenter 158 and Magnetically Particle Inspected.The entire carrier assembly is Titanium Nitride coated.The carriers patented and patent pending design features unique shrouded and forward facing gas ports that have also been re sized so that gas is vented differently to a standard carrier.This results in a system that runs flatter with a smoother energy pulse.
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2 weeks ago
Founded in January 2014, Cryptic Coatings specializes in bolt carrier groups and BCG coatings. With an ever-expanding product line, their BCGs and coatings offer reduced friction, longer lifespans, and increased performance, backed by their lifetime warranty.
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2 weeks ago
The Aero Precision .308 Nickel Boron Bolt Carrier Group is a substantial upgrade from a standard BGC. Its NiB coating reduces friction on sliding surfaces, prevents carbon build-up making clean-up a much easier task, and provides excellent corrosion resistance. MIL-SPEC dimensions ensure correct component function and reliability. Features: - Machined from 8620 steel (carrier) 9310 steel (bolt) - Nickel boron coated - Magnetic particle inspected - Forward assist serrations - Weight: 17.92 oz Specifications Bolt Finish: Nickel Boron Bolt Material: 9310 Steel
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2 weeks ago , by Dealer
Our M16 Bolt Carrier Group is a quality part for your next build. The full mass M16 pattern 8620 steel bolt carrier has been treated with a super slick salt bath nitride finish for easy cleaning, reduced friction, and a reduced need for lubrication. The 9310 steel 5.56 NATO pattern bolt assembly has a durable manganese phosphate finish. A properly staked gas key and forward assist serrations round out the great features. To top it off, each bolt carrier group is magnetic particle inspected to give you peace of mind that your carrier group is from from material defects. Specifications:
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2 weeks ago
San Tan Tactical Enhanced Bolt Carrier Group was designed for shooters who demand superior performance weapon components in the heart of their firearm. STT proudly manufacturers the highest quality firearms components in the industry.Carrier Assembly: The flared rear of the enhanced bolt carrier is designed to reduce carrier tilt/cant during recoil and increase reliability by strategically relocating key bearing surfaces. Made from Case-hardened 8620 steel.The STT enhanced carrier has fewer points of contact, resulting in less friction area.
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2 weeks ago
he Toolcraft 9mm Bolt Carrier Group is a full-mass BCG perfect for your Blowback Pistol Carbine Caliber AR build. Manufactured from a 8620 Steel, and a hardened 17-4 stainless steel firing pin, this Toolcraft 9mm Bolt Carrier Group also features a pistol-type extractor, and removable counterweight. Fully compatible with Glock or Colt lower receivers, Toolcraft has done it again with a superior product Manufacturer: Toolcraft Material: 8620 Steel Carrier, 17-4 Hardened Stainless Firing Pin Type: Blowback, M16 Full Auto Extractor: Pistol Type Coating: Black Nitride
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3 weeks ago
Stripped carrier is finished in an Ion Bonded Flat Dark Earth. Lowers friction and cleans easier.BCM® (MPI) complete bolt carrier group is fully assembled. (BCG)Bolt carrier group (auto version) for your AR15, M16, or M4. Parkerized exterior and chrome lined inside carrier. Machined to USGI specifications. This M16/M4 carrier includes the proper Mil-Spec gas key. Gas key is chrome lined and heat treated per GI specifications. Gas key is secured to carrier via USGI domestic mfg Grade 8 fasteners and properly staked per Mil-Specs.
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3 weeks ago
Blacknitride+ Enhanced Heat Treat Finish,Precision Machined Bolt, RCA Stainless Steel Blacknitride+ Treated Firing Pin,Cam Pin, and Firing Pin Retaining Pin.Carrier material 8620Bolt material 9310Tool steel extractor and cam pin MPN#: 100-001
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3 weeks ago
Description In building or upgrading an AR platform rifle, the bolt is, in many ways, the heart of the rifle. A quality bolt is part of what will make a rifle reliable, so it makes sense that the bolt and its carrier are one of those parts that precision manufacturing has really helped make into a part that can last for high round counts. If you’re looking to upgrade the bolt in your AR, consider the Rubber City Armory Titanium 5.56/.223 Bolt Carrier Assembly .
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4 weeks ago
078-102-007WB M16 Bolt Carrier Group 458 SOCOM/450 BM Nitride MP Cartridge: 458 SOCOM, 458 SOCOM, , 450 Bushmaster Finish: Black Nitride Constructed and Finished for the Big-Bore .458 Get your .458 SOCOM or 450 Bushmaster AR-15 running perfectly with the Brownells M16 .458 SOCOM/450 Bushmaster Bolt Carrier Group, which features construction and finishing designed to provide the best possible performance in your rifle.
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Brownells 1160
1 month ago
SKU: 5165500057 UPC: 810029499828 MFR#: PSACUSTOMMPIBCG Caliber: 5.56 NATO Bolt: C158 Bolt MP Carrier Material: 8620 Steel Profile: Full-Auto Chrome Lined: Yes Firing Pin: 8740, Hard Chrome Coated
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1 month ago
The Ideal Big-Bore Bolt Carrier Group The Brownells Complete .308 Bolt Carrier Group is designed to operate in all AR-10-pattern guns, allowing for a simple drop-in component to complete any .308 Win.-caliber upper. The Brownells Complete .308 Bolt Carrier Group is constructed using a bolt machined from 9310 steel, which is finished with a heat treatment and shot peening. The carrier itself is fabricated from hardened 8620 steel. - Each BCG is quality-checked with magnetic particle inspection - Extractor is installed with rubber insert and spring
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Brownells 2102
1 month ago , by Dealer
Light Duty 8620 Ar15 bolt, comes assembled with gas rings, ejector, extractor, etc.  Made from 8620 steel, mpi tested, phosphate finish. 
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1 month ago
The Lantac M-SPEC BCG is ideal for shooters who want to add a quality assembly to their next build. The bolt carrier group is constructed from high-quality 8620 steel and finished with black nitride for optimal durability and strength. This bolt carrier is precision machined to Mil-Spec dimensions and tolerances for optimal fit and performance. The Lantac carrier is case hardened and hard turned/ground so that its internal dimension are precisely military specifications. Additionally, the BCG is QPQ Nitrided for unrivaled corrosion resistance, durability and performance.
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1 month ago , by Dealer
ALWAYS ARMED 5.56 NATO/.300 BLACKOUT BOLT CARRIER GROUP Made in the USA Compatible with .223/5.56 NATO/.300 BLACKOUT MPI & HPT Mil-Spec Bolt Machined from 158 Carpenter Steel Carrier Machined from 8620 Aircraft Grade Steel 4140 Steel Extractor 4130 Staked Gas Key
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1 month ago
Works with Glock and Colt lowers and magazines Carrier machined from 8620 Steel Material Fully Heat Treated External M-16 Style Extractor, much more durable than 1911 style Full auto compatible Black Nitride Dust Cover Compatible Weight: 14.9 Ounces Removable Carrier Weight - Compatible with JP Enterprises and similar buffer systems. MPN#: ACC-9MM-BCG
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1 month ago
Blacknitride+ Enhanced Heat Treat Finish, Precision Machined Bolt, RCA Stainless Steel Blacknitride+ Treated Firing Pin, Cam Pin, and Firing Pin Retaining Pin. Carrier material 8620 Bolt material 9310 Tool steel extractor and cam pin MPN#: 100-001
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1 month ago
AR10 DPMS Pattern BCG - .308 Bolt Carrier Group - Black NitrideThis Black Nitride .308 Complete BCG is compatible with any AR10, .308 or 7.62x51 rifle that follows the DPMS pattern. The carrier includes forward assist serrations and the bolt is (MPI) certified. Bolt:MPI Inspected9310 Alloy Steel Hardened Steel ExtractorMilspec Gas rings (3)Black Extractor Insert2 Viton O-Rings Bolt Carrier:8620 steelHeavy Duty Full Cut DesignGrade 8 Gas Key Screws, StakedGas Key Material - 4140Cam Pin:8620 steel Nickel Boron PlatedFiring Pin:mil-spec firing pin SKU#: DPP-308-SBN
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1 month ago
The Rubber City Armory Low Mass Carrier is ideal for shooters who desire less muzzle movement between shots. The bolt carrier group is constructed from high-quality 8620 steel and finished with aerospace Blacknitride coating for optimal durability and strength. The Low Mass carrier weighs 6.9 oz. making it much lighter than your standard carrier resulting in optimal performance and making it ideal for competition. This carrier fills the space of a normal AR carrier profile while reducing weight substantially. The aerospace surface treatment provides ultimate durability and wear resistance.
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1 month ago
100-032-658WB 9mm Complete Bolt Mag-Phosphate Cartridge: 9 mm Luger Finish: Mag-Phosphate More Options for Your PCC Build The Stern Defense 9mm Bolts are designed to function with both Colt SMG, Glock magazines and are fully compatible with standard AR15/M16 charging handles, giving you more options for your build. These come with either a Melonite or Nickel-Boron/Melonite hybrid finish, and are fully assembled with all sub-components installed, including firing pin/spring/retaining pin, extractor, and extractor spring. - Constructed from 8620 AISI steel
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1 month ago
Complete BCG easily drops into a standard mil spec AR-15 upper, and it's ready to shoot. Magnetic particle inspected bolt gives long service life. Bolt and carrier feature a matte black phosphate finish that resists heat, wear and corrosion. Carrier is chrome lined and has a staked gas key attached. Includes bolt assembly, firing pin, firing pin retaining pin, cam pin and complete carrier. PLEASE NOTE: This Bolt Carrier Group WILL work with .300 AAC Blackout. However, you should check for proper headspacing before firing.
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1 month ago
Details Caliber: 6.5 Grendel Bolt Steel: 9310 Finish: Nitride Carrier: 8620 Steel Gas Key: Nitride Treated & Properly Staked with Grade 8 Fasteners Features Functions with all PSA 6.5 Grendel Uppers.  9310 steel bolt assembly, nitride treated for durability.  8620 carrier, nitride treated, with a nitride treated gas key properly staked with grade 8 fasteners. MPN#: 5165451022
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1 month ago
When ounces are pounds, the 2A Armament Lightweight Bolt Carrier Group is an excellent solution to both the weight and felt recoil of your AR-15 down. The high quality, precision machined main body is combined with an advanced bearing surface aluminum tail for an excellent combination of weight reduction and reliability. The finned tail helps to reduce wear and drag inside the receiver extension for increased reliability. This bolt carrier group is designed to be used in conjunction with an adjustable gas system. Note: This BCG is not compatible with forward assists.
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1 month ago , by Dealer
Bolt Extractor Bolt Carrier Gas Key Gun attachment with Cam Pin Firing Pin
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1 month ago , by Dealer
Weekend sale! 15% off w/ code: USA15 - Free shipping on all orders! *Check out our other Featured Deals! - http://sunnystateoutdoors.com/collections/featured-items - 9mm M16 Bolt Carrier Group. Ramped and compatible with standard hammers. Nitride QPQ treated 8620 steel. Compatible with lower receivers cut for Colt 9mm magazines and Glock magazines. Made in the USA, Lifetime warranty! Fast, free shipping.
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1 month ago , by Dealer
308 BOLT CARRIER GROUP - NICKEL BORON 8620 Steel Carrier Nickel Boron Coated Finish Staked gas key THE AR10 PLATFORM DOES NOT ENJOY A COMMON DESIGN BETWEEN MANUFACTURERS, LIKE THE AR15. AS A RESULT, THERE CAN AND WILL BE SUBTLE DIFFERENCES IN THE PARTS KITS OF VARIOUS MANUFACTURERS. SOME PARTS, LIKE THE FIRE CONTROL GROUP, ARE SHARED WITH THE AR15 PLATFORM TO PRESERVE THE OPTIONS FOR UPGRADING.
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1 month ago
Milspec Carpenter No. 158 steel HPT Bolt (High Pressure Tested/ Proof) MPI Bolt (Magnetic Particle Inspected) Shot Peened Bolt Chrome Lined Carrier (AUTO) Chrome Lined Gas Key Gas Key Hardened to USGI Specifications Grade 8 Hardened Fasteners Key Staked Per Mil-Spec Tool Steel Extractor BCM Extractor Spring Black Extractor Insert Mil-Spec Crane O-Ring
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1 month ago
100-020-758WB Cartridge: 223 Remington, 5.56 mm NATO, 300 AAC Blackout Finish: Black View Dream Gun Description Specs
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1 month ago , by Dealer
Complete 9mm bolt carrier group assembly Uses a common 5.56 extractor Nitride finish Superior to chrome lined and parkerized bolt carrier groups Made for Glock builds Ramped to use standard hammer 16oz
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2 months ago
100-026-220WB AR-15 Brownells Branded 9mm BCG Black Cartridge: 9 mm Luger Finish: Black A Purpose-Made Bolt for Your Pistol-Caliber Carbine The Brownells 9mm AR-15 Bolt Carrier Group is specifically designed for use in pistol-caliber carbines, which are a growing trend in the AR-15 world. This bolt-carrier group allows AR builders to custom-make their own 9mm AR. The Brownells 9mm AR-15 Bolt Carrier Group is constructed entirely from a single piece of steel billet and features a pinned weight that can be taken out for compatibility with different buffer systems.
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Brownells 1122
2 months ago , by Dealer
assembled m16 bolt carrier group, FDE pvd finish 8620 carrier gas key properly staked 9310 bolt, nitride extractor assembly ejector assembly firing pin / retaining pin cam pin Item #: FDE bcg
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2 months ago , by Dealer
Memorial Day Sale extended! 15% off sitewide w/ code: USA15 Carrier: Machined from 8620 steel & QPQ nitride/melonite treated. Enhanced carrier geometry with M16 profile. The QPQ nitride/melonite treatment hardends the surface to 70 RC and reduces friction, adding corrosion resistance inside and out. Bolt: 9310 & QPQ nitride/melonite treated with additional cryo freeze for extra strength. Shot peened precision ground diameters. Magnetic Particle Inspected and laser marked. Extractor machined from S7 tool steel Crane extractor O ring to boost extraction clamping force.
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2 months ago
Made in USA. Bolt is made of Mil-spec Carpenter 158 steel, Shot peened, High pressure tested and Mag Particle Inspected. Gas key is machined out of bar stock, chrome lined phosphate coated, and secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is phosphated outside and chrome lined inside. Laser engraved with the PSA logo. For packaging considerations, BCG will be packed dry. As a result, it will have a grey, dusty appearance that will turn black with the application of CLP or other preferred lubricant. Extractor Spring Black Extractor Insert Mil-Spec O-Ring
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2 months ago
- Made for 7.62X51 / 308 Cal - 9310 Hardened Steel Bolt, - Hardened extractor S7 tool steel. - Tin COATING (Gold Titanium Nitride Finish) - 17-4 Stainless Steel Firing Pin (Heat treated to H900 Condition) - The group comes fully assembled with properly torqued and staked gas key - HPT/MPI Tested and Marked - 8620 carrier and gas key. - Made in the USA MPN#: GT-BCG-308-TIN
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2 months ago
Burnished & Hand Polished For Smooth Operation & Superior Reliability
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2 months ago
Description Receive $70 off with coupon code ‘308NitrideBCG’ at checkout – Limited to first 75 customers The  enhanced  bolt  carrier  is  designed  to  reduce  carrier  tilt/cant  during  recoil  and   increasing  reliability  by  strategically  relocating  key  bearing  surfaces.  The  enhanced  carrier  has  fewer   points  of  contact  resulting  in  less  friction  area  and  the  slight  increase  in  carrier  mass  extends  dwell   time  and  ensures  proper  gas  pressures  for  reliable  extraction. • Material:  Case  Hardened  8620  Steel
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2 months ago
9310 tool steel bolt Full mil-spec heat treatment Shot-peened to mil-spec Salt bath nitrided bolt and carrier Superfinished carrier body Magnetic particle inspected Bolt lugs are chamfered 45º Spring, insert, and "crane" O-ring installed S7 extractor Full-auto rated Item # WX2-710104 Mfg. Number: FF556BCGCNITRIDE UPC: 816341020870
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2 months ago
100-033-219WB 9mm Complete Bolt Black Semi Auto Only Cartridge: 9 mm Luger Finish: Black Add the Right Bolt-Carrier Group to Your Pistol-Caliber Carbine Today's pistol-caliber carbines are all the rage, and many of these PCCs are based on the popular AR-15 platform. Stern Defense answered the call for a dedicated bolt designed for these 9mm AR-15s.
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2 months ago
100-036-669WB AR-15 Bolt Carrier Group 5.56mm Black Cartridge: 5.56 mm NATO Finish: Black Description Specs An M16 Bolt-Carrier Group That Completes Your Rifle Build Whether you're looking to finalize your latest AR build or have a spare on-hand to keep your current AR-15 running, having an M16 bolt-carrier group is a must, and this high-quality bolt-carrier group is one of the best options on the market. The carrier is machined from 8620 steel, and the bolt is machined from Carpenter 158 tool steel.
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3 months ago , by Dealer
Description The  enhanced  bolt  carrier  is  designed  to  reduce  carrier  tilt/cant  during  recoil  and   increasing  reliability  by  strategically  relocating  key  bearing  surfaces.  The  enhanced  carrier  has  fewer   points  of  contact  resulting  in  less  friction  area  and  the  slight  increase  in  carrier  mass  extends  dwell   time  and  ensures  proper  gas  pressures  for  reliable  extraction. • Material:  Case  Hardened  8620  Steel • Finish:  Black  Nitride.  This  advanced  low  friction  coating  minimizes  the  need  for  lubricants.
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3 months ago
078-000-594WB AR-15 9MM Bolt Assembly for Glock Black Nitride Cartridge: 9 mm Luger Finish: Black Description Specs This Brownells AR-15 9mm Bolt Assembly is a no nonsense, go-to option for those building up a 9mm AR. As this platform becomes increasingly popular, we wanted to make sure we offered a highly reliable option at a good price, and this 9mm Bolt Assembly is just that part. This designed for lower receivers that feed from Glock® pattern magazines.
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Brownells 471