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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On Sale
M16 Bolt Carrier Group
Sale: $79.00MSRP: $149.00M16 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 O-Ring...Sale: $79.00MSRP: $149.00 -
On Sale
Nickel Boron M16 Bolt Carrier Group
Sale: $139.00MSRP: $179.00Nickel Boron M16 Bolt Carrier Group 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 O-ring Insert 223/5.56/300...Sale: $139.00MSRP: $179.00 -
On Sale
9mm Bolt Carrier Group
Sale: $109.00MSRP: $149.009MM 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...Sale: $109.00MSRP: $149.00 -
Out of stockOn Sale
M16 Bolt Carrier Group - Titanium Nitride Coated
Sale: $139.00MSRP: $199.00Titanium Nitride coated 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...Sale: $139.00MSRP: $199.00 -
On Sale
MIL-SPEC CHARGING HANDLE + MIL-SPEC M16 BCG COMBO
Sale: $89.00MSRP: $168.00MIL-SPEC CHARGING HANDLE + MIL-SPEC M16 BCG COMBO AR-15 Charging Handle - Black Made in the USA Machined from 6061 Aluminum Hard Coat Black Anodized Finish Complete and Ready to Drop-in any Milspec AR15 Upper Receiver Cycle Loads with Ease 5...Sale: $89.00MSRP: $168.00 -
Out of stockOn Sale
9MM BOLT CARRIER GROUP - TITANIUM NITRIDE
Sale: $169.00MSRP: $199.009MM TITANIUM NITRIDE 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...Sale: $169.00MSRP: $199.00 -
Out of stockOn Sale
9MM BOLT CARRIER GROUP - NICKEL BORON
Sale: $169.00MSRP: $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...Sale: $169.00MSRP: $199.00 -
7.62 X 39 BOLT CARRIER GROUP
$139.957.62 x 39 Complete Bolt Carrier Group Made in the USA Black Nitride Finish Made from Bolt 9310 Steel and Carrier 8620 Steel Works with AR15 Milspec Uppers$139.95 -
PREMIERE MANUFACTURING AR15 BOLT CARRIER GROUP
$109.00PREMIERE FIREARMS AR15 BOLT CARRIER GROUP M16-cut carrier Machined from 8620 tool steel (carrier) and 9310 steel (bolt) Carrier has forward assist serrations Salt bath black nitride finish – advanced lower friction coating that minimizes the...$109.00 -
Out of stock
308 BOLT CARRIER GROUP - NICKEL BORON
$199.00308 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...$199.00 -
On Sale
M16 Bolt Carrier Group 5.56 - Chameleon PVD
Sale: $94.44MSRP: $199.00M16 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 Peened Blacknitride+™ by H&M MPI 4140 Billet Gas...Sale: $94.44MSRP: $199.00 -
On Sale
308 Bolt Carrier Group
Sale: $129.00MSRP: $179.00308 Bolt Carrier Group 8620 Steel Carrier Salt Bath Black Nitride Finish Staked gas key Bolt & Extractor (.308 compatible) Bolt Carrier Extractor Cam Pin Firing PinSale: $129.00MSRP: $179.00 -
On Sale
M16 Bolt Carrier Group 5.56 - Blue PVD
Sale: $94.44MSRP: $199.00M16 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 H&M MPI 4140 Billet Gas...Sale: $94.44MSRP: $199.00 -
Out of stock
Nickel Boron M16 BCG + Ambidextrous Charing Handle Combo
$218.99NICKEL BORON M16 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...$218.99 -
Out of stock
LOSOK CUSTOM ARMS .308 BOLT CARRIER GROUP WITH UPGRADED NICKEL BORON BOLT
$199.00LOSOK CUSTOM ARMS .308 BOLT CARRIER GROUP For AR-10/LR-308 rifles 158 Carpenter Steel Bolt with Nickel Boron Finish 8620 Steel Carrier with Black Phosphate Finish Made in the USA$199.00 -
On Sale
Premiere Manufacturing Gold AR15 Bolt Carrier Group
Sale: $119.00MSRP: $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...Sale: $119.00MSRP: $149.00 -
On Sale
9mm BCG With Mil-Spec Charging Handle Combo
Sale: $99.00MSRP: $158.009MM Bolt Carrier Group Made in the USA Black Nitride Finish 8620 Steel Carrier 17-4 Stainless Steel Firing Pin Ramped and Compatible with Standard AR15 Hammer Works with Both Colt and Glock Magazines MPI & HPT Removable...Sale: $99.00MSRP: $158.00 -
Out of stock
458 SOCOM BOLT CARRIER GROUP
$129.00458 SOCOM BOLT CARRIER GROUP .458 SOCOM complete Bolt Carrier Group Nitride Finished 9310 Steel Bolt MPI Bolt (Magnetic Particle Inspected) Grade 8 Hardened Fasteners Key Staked per Mil-Spec Black Extractor Insert$129.00 -
Out of stockOn Sale
MIL SPEC AR15 BOLT CARRIER GROUP AND AMBIDEXTROUS CHARGING HANDLE COMBO
Sale: $99.00MSRP: $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: $99.00MSRP: $159.00 -
On Sale
Premiere Manufacturing Chrome AR15 Bolt Carrier Group
Sale: $119.00MSRP: $149.00Chrome 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...Sale: $119.00MSRP: $149.00