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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FailZero .224 Valkyrie Bolt Carrier Group - Nickel Boron
$179.99.224 VALKYRIE BOLT CARRIER GROUP Bolt Gas Key Extractor Bolt Carrier Cam Pin Firing Pin$179.99 -
308 Bolt Carrier Group With Ambidextrous Charging Handle
$228.99308 Bolt Carrier Group With Ambidextrous Charging Handle 308 Bolt Carrier Group 8620 Steel Carrier Salt Bath Black Nitride Finish Staked gas key 308 Ambidextrous Charging Handle Ambidextrous Charging Handle .308 Winchester/DPMS...$228.99 -
AMBI CHARGING HANDLE + TITANIUM NITRIDE M16 BCG COMBO
Sale: $169.00MSRP: $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: $169.00MSRP: $238.99 -
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 -
.450 Bushmaster/ .458 Socom Stripped Bolt
Sale: $39.99MSRP: $49.99.450 Bushmaster/ .458 Socom Stripped Bolt 9310 Steel Parkerized Finish Compatible with .450 Bushmaster and .458 Socom Fits standard Mil-Spec AR-15 Carrier Magnetic Particle Inspected (MPI) Staked Gas Key DesignSale: $39.99MSRP: $49.99 -
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 -
AMBI CHARGING HANDLE + LIGHTWEIGHT M16 BCG COMBO
Sale: $157.95MSRP: $238.99AMBI CHARGING HANDLE + LOW MASS M16 BCG COMBO NON-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...Sale: $157.95MSRP: $238.99 -
Andro Corp Gold AR15 Bolt Carrier Group
$160.00Andro Corp Gold AR-15 Bolt Carrier Group High Pressure Tested (HPT) Magnetic Particle Inspected (MPI) Carrier machined from 8620 alloy, full auto profile, heat treated, Grade 1 Polished Gold TiN Finish Gas Key machined from 4130 chromoly steel...$160.00 -
Andro Corp Phosphate AR15 Bolt Carrier Group
$129.00Andro Corp Phosphate AR15 Bolt Carrier Group High Pressure Tested (HPT) Magnetic Particle Inspected (MPI) Carrier machined from 8620 alloy, full auto profile, heat treated, Nitrided Gas Key machined from 4130 chromoly steel alloy, heat treated and...$129.00 -
FAILZERO 6.8 SPC BOLT CARRIER GROUP NO HAMMER - NICKEL BORON COATED
$189.996.8 SPC BOLT CARRIER GROUP Nickel Boron treated parts include: M16 Cut Bolt Carrier High quality bolt carrier assembly, the new Fail Zero nickel boron BCG. With cam pin and carrier key. Bolt & Extractor- 6.8 SPC Compatible 224...$189.99 -
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 -
Andro Corp Nitride AR15 Bolt Carrier Group
$129.00Andro Corp Nitride AR15 Bolt Carrier Group High Pressure Tested (HPT) Magnetic Particle Inspected (MPI) Carrier machined from 8620 alloy, full auto profile, heat treated, Nitrided Gas Key machined from 4130 chromoly steel alloy, heat treated and...$129.00 -
.308 Winchester 20" Barrel and Bolt Carrier Group Combo
$378.00308 Bolt Carrier Group 8620 Steel Carrier Salt Bath Black Nitride Finish Staked gas key Always Armed 20" 308 Winchester 1:10 Twist 4150 Barrel 4150 Chromoly Steel Light SOCOM Profile M4 Feed Ramps .308 Winchester Barrel (7.62x51)...$378.00 -
AMBI CHARGING HANDLE + CHROME M16 BCG COMBO
Sale: $169.00MSRP: $188.99AMBI CHARGING HANDLE + CHROME M16 BCG COMBO CHROME 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...Sale: $169.00MSRP: $188.99 -
CMMG 22LR AR CONVERSION KIT - 1 MAGAZINE
Sale: $150.00MSRP: $199.99CMMG 22LR AR CONVERSION KIT - 1 MAGAZINE 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 1 25 Round MagazinesSale: $150.00MSRP: $199.99 -
9" .22LR Barrel and BCG Conversion Kit
$225.009" .22LR Barrel and BCG Conversion Kit .22LR STAINLESS STEEL BOLT CARRIER GROUP Stainless Steel Lightweight Chambered in .22LR Fits Most Standard AR-15 Upper Receivers 9" .22LR BARREL 1:16 Twist Salt Bath Nitride Black Finish 1/2"-28...$225.00 -
Andro Corp Chrome AR15 Bolt Carrier Group
$169.00Andro Corp Chrome AR15 Bolt Carrier Group High Pressure Tested (HPT) Magnetic Particle Inspected (MPI) Carrier machined from 8620 alloy, full auto profile, heat treated, Grade 1 Polished Chrome Finish Gas Key machined from 4130 chromoly steel...$169.00 -
Andro Corp Gold AR15 Bolt Carrier Group - G3 High Polish
Sale: $199.00MSRP: $229.00Andro Corp Gold AR-15 Bolt Carrier Group - G3 High Polish HP proof testing, 100%using a high pressure M197 or SAAMI commercial equivalent; without evidence of failure MPI testing after above, 100%inspection per ASTM E1444 using a standard 5...Sale: $199.00MSRP: $229.00 -
Rise Armament M16 Bolt Carrier Group - Nickel Boron
$259.99Rise Armament AR-15 Bolt Carrier Group - Nickel Boron AR-15 Bolt Carrier Group Caliber: 5.56 NATO / .223 Remington Precision Manufactured, Individually Inspected Compatible with Lighter Buffers to Allow Faster Follow-Up...$259.99 -
CMMG .22LR BARREL COLLAR ASSEMBLY
$59.95CMMG .22LR BARREL COLLAR ASSEMBLY Used to covert a CMMG Conversion Bolt Carrier Group to be used with a a dedicated .22LR Upper Collar designed to work with CMMG and RTB .22LR Barrels$59.95