Aero Precision .308/7.62 Bolt Carrier Group (Black Nitride)

Aero Precision builds this .308 Winchester / 7.62x51 NATO bolt carrier group with a carrier machined from 8620 steel and finished in slick black nitride for corrosion resistance and easy cleanup. The bolt is 9310 steel and the gas key is properly staked, the same construction standard Aero uses across its AR-10 component line. Aero lists it for its M5 platform and AR .308-style uppers, the DPMS/LR-308 pattern. Large-frame carrier fit varies by maker, so confirm it against your exact upper and barrel extension before you order.

For forced-reset trigger builds, the carrier profile is the point. An FRT relies on a full-auto (M16) carrier underside to mechanically push the trigger back into reset on every cycle. A semi-auto or AR-15-cut .308 carrier lacks that extended underside, so it will not reliably reset the trigger. An AR-15-pattern forced-reset trigger will physically fit an LR-308/SR-25 lower on standard 0.154 inch pins, but it only resets correctly when paired with an M16-profile .308 carrier, so confirm this carrier's rear profile with the seller before you buy.

Black nitride runs cleaner and harder than phosphate, which matters on a carrier cycling fast under an FRT. For builders assembling a forced-reset AR-10 in .308 or 7.62x51, the carrier is the non-negotiable gating component; the trigger choice is secondary to getting a full-auto carrier right.