*CONTACT US FOR A SPECIAL COUPON CODE!*
The Lantac USA M-SPEC 7.62/.308 M-Spec Nitride Bolt Carrier Group (SKU: 01-MSPEC-762-NIT-BCG) is a mil-spec-plus BCG designed for AR-10 / LR-308 / DPMS-pattern rifles (Gen 1 / DPMS style, not Armalite/SR-25 pattern).
Key Features and Specs
- Carrier: 8620 steel, case hardened, hard turned/ground for exact mil-spec internal dimensions. Full-auto (M16) profile with increased mass for smoother operation and better lock time. QPQ (Quench Polish Quench) nitride finish (black) for superior corrosion resistance, wear resistance, and lower friction compared to traditional phosphate.
- Bolt: Machined from Carpenter 158 or 9310 steel, shot peened, hard turned/ground, and MPI (Magnetic Particle Inspected). Meets or exceeds mil-spec standards.
- Cam Pin: Lantac's CP-R360-H domed-head design, made from 17-4PH stainless steel, hand-polished, and hardened to H900 condition. This reduces friction and wear on the upper receiver.
- Other Details: Mil-spec gas key (properly staked), compatible with full-auto and semi-auto fire. Shot peening uses S110 shot per Almen Gage A-2 spec (.006–.008).
- Compatibility: Specifically for DPMS-pattern AR-10 rifles (e.g., many Aero Precision M5 builds confirm compatibility). Not for Armalite-pattern uppers.
- Weight: Not explicitly listed for this model in all sources, but similar full-auto .308 BCGs from Lantac (including their enhanced versions) typically run around 1 lb 2 oz or slightly less for the standard M-SPEC line.
- Price: MSRP around $244.99 (street price often $220–$245 depending on retailer).
Positioning in Lantac's Lineup
Lantac positions the M-SPEC series as an affordable "above mil-spec" option for budget or standard builds that still need reliability. It adds upgrades like the nitride finish and premium domed cam pin without the higher cost of their fully Enhanced (E-BCG) line (which adds forward porting, enlarged vents, NiB or nitride options, and even more mass at ~$352).
It's a solid choice for a reliable, no-frills .308/7.62 BCG in a DPMS-pattern rifle, especially if you're building on a budget but want better-than-basic components.
Common User Notes
- The nitride finish provides good slickness and durability (though some prefer phosphate for certain wear characteristics; nitride is generally praised for corrosion resistance).
- Performs well in standard and suppressed setups thanks to the added carrier mass.
- Lifetime warranty from Lantac (made in USA).
