Bolt Carrier Groups
At Grid Defense, we provide a diverse range of Bolt Carrier Groups designed to deliver exceptional reliability and performance for your AR-15 rifle. Our meticulously crafted BCGs, constructed from premium materials and featuring precise engineering, ensure smooth cycling, enhanced durability, and easy maintenance, allowing you to focus on your shooting experience with confidence. Explore our selection of top-notch bolt carrier groups to elevate the reliability and functionality of your AR15.
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Out of stock
Premiere Manufacturing Gold AR15 Bolt Carrier Group
$149.00Gold AR15 Bolt Carrier Group Milspec Carpenter No. 158® steel bolt Shot Peened Bolt Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Steel Extractor Extractor Spring Extractor...$149.00 -
On Sale
.450 Bushmaster/.458 SOCOM Bolt Carrier Group
Sale: $99.00MSRP: $199.00.450 Bushmaster/.458 SOCOM Bolt Carrier Group Black Nitride Carrier Finish 9310 Steel Bolt MPI Bolt (Magnetic Particle Inspected) Parkerized Bolt Finish Staked Gas Key Compatible with .450 Bushmaster and .458 SOCOM AR-15 platformsSale: $99.00MSRP: $199.00 -
On Sale
MIL SPEC AR15 BOLT CARRIER GROUP AND AMBIDEXTROUS CHARGING HANDLE COMBO
Sale: $129.00MSRP: $159.00PREMIERE FIREARMS AR15 BOLT CARRIER GROUP AND AMBIDEXTROUS CHARGING HANDLE COMBO M16-cut carrier Machined from 8620 tool steel (carrier) and 9310 steel (bolt) Carrier has forward assist serrations Salt bath black nitride finish – advanced...Sale: $129.00MSRP: $159.00 -
9MM BOLT CARRIER GROUP AND AMBIDEXTROUS CHARGING HANDLE
$199.009MM 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...$199.00 -
Out of stockOn Sale
AMBI CHARGING HANDLE + GOLD M16 BCG COMBO
Sale: $129.99MSRP: $188.99AMBI CHARGING HANDLE + GOLD M16 BCG COMBO Gold AR15 Bolt Carrier Group Milspec Carpenter No. 158® steel bolt Shot Peened Bolt Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Steel...Sale: $129.99MSRP: $188.99 -
Out of stock
NON-SERRATED LOW MASS M16 BOLT CARRIER GROUP
$199.99NON-SERRATED LOW MASS M16 BOLT CARRIER GROUP Caliber: .223 / 5.56 / 300 Blackout Enhanced 9310 Steel (Bolt) 8620 Tool Steel (Carrier) Mil-Spec Extractor Spring, black extractor insert, Viton O-Ring Tool Steel Extractor Shrouded Firing...$199.99 -
AR-15 Bolt Carrier Group Completion Kit - 5.56/.300
$79.99AR15 Bolt Assembly 9310 MPI - 5.56/.300 Caliber: .223/5.56/300AAC Bolt Material: 9310 Steel MPI (Magnetic Particle Inspected) Bolt Finish: Nitride Black Oxide Extractor Part is a Completely Assembled Bolt (see...$79.99 -
FAILZERO M16 BOLT CARRIER GROUP - NICKEL BORON
$169.99Failzero M16 Bolt Carrier Group - Nickel Boron Includes: Firing Pin Bolt Carrier Extractor Cam Pin Carrier Key Bolt & Extractor (5.56 / .223 Compatible)$169.99 -
450 BUSHMASTER BOLT CARRIER GROUP
$189.99450 BUSHMASTER BOLT CARRIER GROUP Bolt Extractor Bolt Carrier Gas Key Gun attachment with Cam Pin Firing Pin$189.99 -
Odin Works 9mm Enhanced Bolt Carrier Group - Black
$169.00Odin Works 9mm Enhanced Bolt Carrier Group - Black 416 Heat Treated Stainless Steel Carrier 174 Heat Treated Stainless Steel Firing Pin Specifically Designed 9mm Extractor 174 Heat Treated Alignment Screws Proprietary Firing Pin Retainer No...$169.00 -
FAILZERO 458 SOCOM BOLT CARRIER GROUP NO HAMMER NIB
$189.99FAILZERO 458 SOCOM BOLT CARRIER GROUP NO HAMMER NIB Fail Zero BCG Bolt Gas Key Extractor Bolt Carrier Cam Pin Firing Pin$189.99 -
Out of stockOn Sale
AMBI CHARGING HANDLE + TITANIUM NITRIDE M16 BCG COMBO
Sale: $209.00MSRP: $238.99AMBI CHARGING HANDLE + TITANIUM NITRIDE M16 BCG COMBO AXEM Distributors High Polish Nickel Boron M16 Bolt Carrier Group Shot Peened Bolt Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per...Sale: $209.00MSRP: $238.99 -
On Sale
CMMG .22 ARC Bolt Group
Sale: $149.00MSRP: $219.99CMMG .22 ARC Bolt Group Machined from Stainless Steel Durable and Long Lasting Compatible with Milspec AR15 Upper Receivers Designed for .22LR Conversions Made in the USASale: $149.00MSRP: $219.99 -
Out of stockOn Sale
AMBI CHARGING HANDLE + CHAMELEON PVD M16 BCG COMBO
Sale: $169.00MSRP: $238.99AMBI CHARGING HANDLE + CHAMELEON PVD M16 BCG COMBO M16 Bolt Carrier Group 5.56 - Chameleon 8620 M16 Style Carrier Ionbond Coating (PVD) Heat Treated Final Grind Before Plating 9310 5.56/.223 Bolt Heat Treated Shot...Sale: $169.00MSRP: $238.99 -
Out of stock
CMMG 22LR AR CONVERSION KIT
$229.95CMMG 22LR AR CONVERSION KIT All Stainless Steel Construction includes Anti-Jam Charging Handle, Cleaning Jag Guide Rod, Forward Assist Adaptor, and a 25rd Magazine. Works in most 5.56/.223 chambered rifles 3 25 Round Magazines$229.95 -
Odin Works Stainless Steel 9mm BCG
$169.00Odin Works Stainless Steel 9mm BCG Designed for Semi-Auto 9mm AR15 Specifically designed 9mm extractor for reliability Hybrid design works with Colt or Glock platform Proprietary threaded firing pin retainer for easy service 416 heat treated...$169.00 -
FAILZERO 6.5 GRENDEL BOLT CARRIER GROUP
$179.996.5 GRENDEL BOLT CARRIER GROUP Nickel Boron treated parts include: Bolt & Extractor (.224 Valkyrie and 6.8 SPC compatible) M16 Cut Bolt Carrier Cam Pin Carrier Key Firing Pin Fail Zero 6.5 Grendel BCG$179.99 -
FAILZERO LIGHTWEIGHT BOLT CARRIER GROUP
$234.99FAILZERO LIGHTWEIGHT BOLT CARRIER GROUP Specs - Carrier weighs only 6.4 oz and complete BCG is only 9.2 oz - Compatible in all Mil-spec AR Platforms - All components are EXO Nickel Boron with a high polish finish -...$234.99 -
Out of stockOn Sale
AMBI CHARGING HANDLE + BLUE PVD M16 BCG COMBO
Sale: $169.00MSRP: $238.99AMBI CHARGING HANDLE + BLUE PVD M16 BCG COMBO M16 Bolt Carrier Group 5.56 - Blue 8620 M16 Style Carrier Ionbond Coating (PVD) Heat Treated Final Grind Before Plating 9310 5.56/.223 Bolt Heat Treated Shot Peened Blacknitride+™ by...Sale: $169.00MSRP: $238.99 -
FAILZERO 7.62X39 NO HAMMER BOLT CARRIER GROUP NIB
$189.99FAILZERO 7.62X39 NO HAMMER BOLT CARRIER GROUP NIB Nickel Boron treated parts include: Bolt & Extractor (7.62x39 compatible) M16 Cut Bolt Carrier Cam Pin Carrier Key Made In the USA$189.99