M16 Standard Bolt Carrier Group
The Battle Arms Development M16 Standard Bolt Carrier Group is a full-auto profile BCG built for AR-15, M4, and M16 platforms chambered in 5.56 NATO, .223 Rem, and .300 BLK. The carrier is machined from billet 8620 steel and case-hardened, while the 9310 steel bolt is shot-peened, MPI and HPT inspected, and finished in slick Black Nitride for corrosion resistance and easy cleaning. A properly staked 4140 gas key with Grade 8 fasteners keeps the BCG locked together round after round. It's a solid choice for duty builds, defensive carbines, and high-round-count range rifles where reliability is non-negotiable.
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- SKU
- BAD-BCG-M16
$170.52
Description
Features
- Full-Auto M16 Profile Carrier — Heavier M16-cut carrier adds mass to reduce bolt bounce and slow the cyclic rate for more reliable, controllable cycling in semi-auto and full-auto rifles.
- 8620 Case-Hardened Steel Carrier — Machined from billet 8620 steel and case-hardened for long service life under sustained fire.
- 9310 Steel Bolt, MPI and HPT Tested — Shot-peened 9310 steel bolt is High-Pressure Tested and Magnetic Particle Inspected to confirm there are no hidden flaws.
- Black Nitride Finish — Ultra-hard, corrosion-resistant nitride coating reduces friction, simplifies cleaning, and cuts down on the need for heavy lubrication.
- Properly Staked Gas Key — 4140 steel gas key machined from billet, secured with Grade 8 fasteners and properly staked to mil-spec to prevent loosening under recoil.
- Hard-Chromed Firing Pin — Centerless-ground 17-4 H-900 steel firing pin with a hard chrome finish for slick, reliable ignition and easy carbon removal.
- 4340 Hardened Steel Cam Pin — Nitride-coated cam pin reduces wear and friction against the carrier during cycling.
- 5.56 NATO / .223 Rem Compatible — Drops into any standard AR-15, M4, or M16 upper chambered in 5.56 NATO, .223 Remington, or .300 BLK.
- Complete and Ready to Run — Ships as a complete BCG with bolt assembly, firing pin, cam pin, firing pin retainer, and staked gas key — no extra parts to source.
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Customer Reviews
Top customer reviews
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Drops Right In, Runs PerfectThrew this BCG into my AR build last weekend and honestly it was stupid easy, just dropped it right into the upper with zero fitting issues, no gunsmithing required at all. Ran a couple hundred rounds of 5.56 through it at the range and not a single hiccup, cycled smooth every single time. The black nitride finish looks CLEAN and feels like itll hold up way better than a regular phosphate coating over time.
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