Lantac .308/7.62 E-BCG Full-Auto Style BCG – Nickel Boron

The LANTAC .308/7.62 E-BCG is a DPMS-pattern bolt carrier group built for AR-10/.308 platforms. The carrier is precision machined from 8620 steel with a 9310 precision hard-ground bolt, and the complete assembly receives the UCT EXO electroless Nickel Boron treatment for enhanced lubricity. Forward-facing gas ports and enlarged vents are incorporated to alter the gas pulse for smoother reciprocation and reduced upper-receiver pressurization. The assembly includes the CP-R360-H domed cam pin and ships with mil-spec gas rings and a staked gas key for reliable service.

Key Specifications

• The carrier is machined from 8620 steel.
• The bolt is a 9310 precision hard ground bolt.
• The finish is UCT EXO electroless Nickel Boron.
• Pattern compatibility is DPMS Gen 1 / AR-10.
• The assembly weight is 1 lb 2.1 oz.
• Includes forward porting and enlarged vents for a modified gas pulse.
• Features a CP-R360-H domed cam pin machined from 17-4PH stainless steel hardened to H900 (~45RC).
• Supplied with Mil-Spec gas rings and a staked gas key.
• Coating performance is listed as coefficient of friction 0.02 and surface hardness 82-85 Rockwell C.

Designed for builders and shooters who prioritize smooth, reliable operation in AR-10/DPMS-style rifles, the LANTAC E-BCG combines hardened, precision-ground components with a durable Nickel Boron UCT EXO treatment. Its mass, porting and hardware choices aim to deliver controlled reciprocation and reduced receiver pressurization for a wide range of semi-auto and full-auto-style applications. For demanding assemblies that benefit from a robust, service-oriented bolt carrier group, this offering provides a high-quality, specification-driven option.