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 AR10 No Hammer Bolt Carrier Group - Nickel Boron
$259.99AR10 (.308) BCG - No Hammer Description This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR10 upper receivers. All critical parts are coated with EXO Nickel...$259.99 -
On Sale
6.5 Grendel Type II/ 6mm ARC Bolt Carrier Group
Sale: $89.00MSRP: $199.006.5 Grendel Type II/ 6mm ARC Bolt Carrier Group 9310 Steel Bolt Magnetic Particle Inspected Staked Gas Key Black Nitride Finished Carrier Parkerized FinSale: $89.00MSRP: $199.00 -
Out of stockOn Sale
AMBI CHARGING HANDLE + CHROME M16 BCG COMBO
Sale: $139.00MSRP: $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...Sale: $139.00MSRP: $188.99 -
Spike's Tactical M16 Light Weight Bolt Carrier Group - Nickel Boron
$250.00Complete Nickel Boron Plated M-16 BCG Nickel Boron Coating Inside and Out (Bolt, Carrier, and Gas Key) Laser Engraved with ST Spider logo Mil Spec Carrier 8620 Tool Steel Full Auto M-16 Holes...$250.00 -
Out of stock
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 -
Out of stock
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...$169.00 -
Out of stockOn Sale
.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...Sale: $39.99MSRP: $49.99 -
Out of stockOn Sale
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...Sale: $157.95MSRP: $238.99 -
Out of stock
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...$160.00 -
Out of stock
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...$129.00 -
Out of stock
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...$129.00 -
Out of stockOn Sale
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...Sale: $150.00MSRP: $199.99 -
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...$189.99 -
Out of stock
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...$225.00 -
.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$378.00 -
Out of stockOn Sale
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...Sale: $199.00MSRP: $229.00 -
CMMG .22LR Conversion Bolt Carrier Group
$189.95CMMG .22LR Conversion Bolt Carrier Group Drop in conversion bolt carrier group for a 5.56 barrel/upper receiver Compatible with CMMG .22LR Magazines Swap the BCG and magazine to begin shooting ...$189.95 -
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...$259.99 -
WMD GUNS NIB-X 5.56 BOLT ASSEMBLY
$70.00Upgrade your AR-15 drive system with the WMD Guns NiB-X 5.56 Bolt Assembly, built to deliver maximum operational reliability, high corrosion resistance, and effortless cleaning under heavy fire...$70.00 -
Out of stock
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