Bolt Carrier Groups
The bolt carrier group is the heart of any AR10/AR15/M4/M16 type rifle, carbine or AR pistol. Bet-your-life dependability is a non-negotiable prerequisite. We carry Aero Precision, Toolcraft, Fail Zero and Spike's Tactical BCGs with Nickel Boron, Black Nitride, Ionbond DLC, Chrome/Magnesium Phosphate and Titanium Nitride-Gold finishes with M16 profile carriers. Chances are we have the AR BCG that you are looking for. See our Bolt Carrier Group Buyer's Guide.
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Out of Stock
Toolcraft Black Nitride BCG 224 Valkyrie
Toolcraft
$155.00Free Shipping on all Toolcraft Bolt Carrier Groups! Your .224 Valkyrie build deserves the best bolt carrier group money can buy. This .224 Valkyrie BCG by Toolcraft is the highest quality BCG on the market today. Finished in Black Nitride for a lifetime...$155.00 -
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Toolcraft Black Nitride BCG 450 Bushmaster
Toolcraft
$154.99Free Shipping on all Toolcraft Bolt Carrier Groups! Your 450 Bushmaster AR-15 build deserves the best bolt carrier group money can buy. This 450 Bushmaster BCG by Toolcraft is the highest quality BCG on the market today. Finished in Black Nitride for a...$154.99 -
Out of Stock
Toolcraft Gray BCG 7.62X39
Toolcraft
$199.99Free Shipping on all Toolcraft Bolt Carrier Groups! Note: This 7.62X39 BCG is not compatible with the Palmetto State Armory KS-47 Toolcraft uses state-of-the-art machinery, processes and quality control to ensure that every bolt carrier group is...$199.99 -
Out of Stock
Toolcraft FDE BCG 7.62X39
Toolcraft
$199.99Free Shipping on all Toolcraft Bolt Carrier Groups! Note: This 7.62X39 BCG is not compatible with the Palmetto State Armory KS-47 Toolcraft uses state-of-the-art machinery, processes and quality control to ensure that every bolt carrier group is...$199.99 -
Out of Stock
Toolcraft Black Nitride BCG 458 SOCOM
Toolcraft
$154.99Free Shipping on all Toolcraft Bolt Carrier Groups! Your 458 SOCOM AR-15 build deserves the best bolt carrier group money can buy. This 458 SOCOM BCG by Toolcraft is the highest quality BCG on the market today. Finished in Black Nitride for a lifetime...$154.99 -
Out of Stock
Toolcraft Black Nitride C158 BCG Left Hand 556
Toolcraft
$189.99Toolcraft left handed Bolt Carrier Groups ship FREE. Your Left-Handed AR15 Build deserves the best quality BCG you can get - Toolcraft! This quality Toolcraft bolt carrier group has all the outstanding specs of the right-handed Toolcraft BCG, but it's...$189.99 -
Out of Stock
Toolcraft Black Nitride (9310) BCG Left Hand 556
Toolcraft
$169.99Toolcraft left handed Bolt Carrier Groups ship FREE. Your Left-Handed AR15 Build deserves the best quality BCG you can get - Toolcraft! This quality Toolcraft bolt carrier group has all the outstanding specs of the right-handed Toolcraft BCG, but it's...$169.99 -
On SaleSee Best Price In Cart!
Toolcraft Black Nitride BCG 308
Toolcraft
Now: $219.99Was: $249.99Free Shipping on all Toolcraft Bolt Carrier Groups! This Toolcraft 308 Bolt Carrier Group is designed for use in DPMS pattern AR10 rifles chambered in the 308 family of calibers. It is a full auto BCG and has forward assist serrations. This BCG is not...Now: $219.99Was: $249.99 -
Best Seller!See Best Price In Cart!
Toolcraft 308 BCG Nickel Boron Bolt Carrier Group
Toolcraft
MSRP: $289.99$249.99Free Shipping on all Toolcraft Bolt Carrier Groups! This Toolcraft 308 Bolt Carrier Group is finished in Nickel Boron and is designed for use in DPMS pattern AR10 rifles chambered in the 308 family of calibers. It is a full auto BCG and has forward...MSRP: $289.99$249.99 -
On SaleSee Best Price In Cart!
Toolcraft DLC Black BCG 308
Toolcraft
Now: $249.99Was: $299.99Free Shipping on all Toolcraft Bolt Carrier Groups! This Toolcraft 308 DLC Bolt Carrier Group is designed for use in DPMS pattern AR10 rifles chambered for the 308 family of calibers. Not for use with DPMS G2. It is a full auto BCG and has forward...Now: $249.99Was: $299.99 -
Out of Stock
Toolcraft Matte Chrome BCG 556
Toolcraft
$224.99Free Shipping on all Toolcraft Bolt Carrier Groups! See also our Polished Chrome BCG. We are extremely pleased to finally be able to offer a chrome bolt carrier group manufactured by Toolcraft! These BCGs exceeded all our expectations. The...$224.99 -
Out of Stock
Toolcraft Chrome BCG 556
Toolcraft
$224.99Free Shipping on all Toolcraft Bolt Carrier Groups! See also our Matte Chrome BCG. We are extremely pleased to finally be able to offer a chrome bolt carrier group manufactured by Toolcraft! These BCGs exceeded our expectations. The combination...$224.99 -
Out of Stock
Fail Zero Nickel Boron BCG 308
FailZero
$259.99Free Shipping on all Fail Zero Bolt Carrier Groups! FailZero is the undisputed pioneer of Nickel Boron technology. When failure is not an option, you can depend on Fail Zero. This Fail Zero 308 BCG is fully assembled and drop-in ready for most Mil-Spec...$259.99 -
Out of Stock
Toolcraft Gray BCG 224 Valkyrie
Toolcraft
$199.99Free Shipping on all Toolcraft Bolt Carrier Groups! Toolcraft uses state-of-the-art machinery, processes and quality control to ensure that every bolt carrier group is capable of the most demanding missions. This has made Toolcraft a first choice...$199.99 -
Out of Stock
Toolcraft FDE BCG 224 Valkyrie
Toolcraft
$199.99Free Shipping on all Toolcraft Bolt Carrier Groups! Toolcraft uses state-of-the-art machinery, processes and quality control to ensure that every bolt carrier group is capable of the most demanding missions. This has made Toolcraft a first choice...$199.99 -
On Sale
Toolcraft 6.5 Creedmoor Double Ejector BCG
Toolcraft
Now: $249.99Was: $259.99Free Shipping on all Toolcraft Bolt Carrier Groups! This Toolcraft 6.5 Creedmoor Bolt Carrier Group is the best 6.5 Creedmoor BCG available! Toolcraft engineers designed this bolt carrier group specifically with reliability in mind for the high pressure...Now: $249.99Was: $259.99 -
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6.5 Creedmoor Double Ejector BCG Nickel Boron
Toolcraft
$269.99Free Shipping on all Toolcraft Bolt Carrier Groups! This Toolcraft 6.5 Creedmoor Bolt Carrier Group has been upgraded with a Nickel Boron finish to make it the best 6.5 Creedmoor BCG available! Toolcraft engineers designed this bolt carrier group...$269.99 -
Out of Stock
Toolcraft 260 Remington Double Ejector BCG
Toolcraft
$289.99Free Shipping on all Toolcraft Bolt Carrier Groups! This Toolcraft 260 Remington Bolt Carrier Group is the best 260 Remington BCG available! Toolcraft engineers designed this bolt carrier group specifically with reliability in mind for the high pressure...$289.99 -
Out of Stock
AR-15 Extractor Spring Upgrade Kit
$13.99 - $19.99This upgrade will help keep your AR-15 functioning reliably especially when dirty. The Wolff Gunsprings Brand extra power extractor spring increases extractor tension and helps keep the extractor from slipping off the case head during extraction. This...$13.99 - $19.99 -
BCM BCG M16 5.56 Bolt Carrier Group
Please Shop Brownells for Bravo Company (BCM) BCGs 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... -
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Toolcraft Nickel Boron BCG 6.8 SPC
Toolcraft
$199.99Free Shipping on all Toolcraft Bolt Carrier Groups! Your 6.8 SPC build deserves the best bolt carrier group money can buy. This 6.8 SPC Nickel Boron BCG by Toolcraft is the highest quality BCG on the market today. Nickel Boron is an extremely...$199.99 -
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Toolcraft DLC BCG 6.8 SPC
Toolcraft
$199.99Free Shipping on all Toolcraft Bolt Carrier Groups! Your 6.8 SPC build deserves the best BCG and this is it! Toolcraft has a reputation for making the best BCGs in the world, and this 6.8 SPC BCG is no exception. The Ionbond Diamond Like Carbon...$199.99 -
Out of Stock
Toolcraft Nickel Boron BCG 224 Valkyrie
Toolcraft
$199.99Free Shipping on all Toolcraft Bolt Carrier Groups! Your 224 Valkyrie build deserves the best bolt carrier group money can buy. This 224 Nickel Boron BCG by Toolcraft is the highest quality BCG on the market today. Nickel Boron is an extremely...$199.99 -
Out of Stock
Toolcraft DLC BCG 224 Valkyrie
Toolcraft
$199.99Free Shipping on all Toolcraft Bolt Carrier Groups! Your .224 Valkyrie build deserves the best bolt carrier group! This .224 Valkyrie BCG by Toolcraft is the highest quality BCG on the market today. The Ionbond Diamond Like Carbon (DLC) finish is...$199.99 -
Out of Stock
Toolcraft Phosphate BCG 224 Valkyrie
Toolcraft
$154.99Free Shipping on all Toolcraft Bolt Carrier Groups! Your 224 Valkyrie build deserves the finest components possible. This 224 Valkyrie phosphate bolt carrier group by Toolcraft is the highest quality BCG on the market today. Finish is black...$154.99 -
Out of Stock
Toolcraft DLC BCG 450 Bushmaster
Toolcraft
$199.99Free Shipping on all Toolcraft Bolt Carrier Groups! Your 450 Bushmaster build deserves the best bolt carrier group! This 450 Bushmaster BCG by Toolcraft is the highest quality BCG on the market today. The Ionbond Diamond Like Carbon (DLC) finish...$199.99 -
Out of Stock
Toolcraft DLC BCG 458 SOCOM
Toolcraft
$199.99Free Shipping on all Toolcraft Bolt Carrier Groups! Your 458 SOCOM build deserves the best bolt carrier group! This 458 SOCOM BCG by Toolcraft is the highest quality BCG on the market today. The Ionbond Diamond Like Carbon (DLC) finish is an...$199.99
