Lantac M-SPEC BCG 7.62/.308 QPQ Nitride

Description

The Lantac M-SPEC 7.62/.308 bolt carrier group is machined to mil-spec dimensions with enhancements for reliable service in AR-10 and DPMS-pattern platforms. The carrier uses a full-auto style design with increased mass and is produced from 8620 steel that is case hardened and hard turned/ground. The bolt is machined from Carpenter 158 or 9310 and is shot peened and hard turned per military specification. A QPQ nitride finish is applied to increase corrosion resistance and durability, and the assembly ships with a domed 17-4PH stainless cam pin to reduce friction and wear.

Key Specifications

• Made by Lantac USA for consistent OEM naming and fit.
• Model designation is M-SPEC reflecting mil-spec dimensions with select enhancements.
• Chambering indicated in product naming as 7.62/.308.
• Designed to fit AR-10 / DPMS-pattern rifles.
• The carrier is manufactured from 8620 steel and is case hardened.
• The bolt is machined from Carpenter 158 or 9310 and is shot peened and hard turned.
• Surface treatment uses a QPQ nitride finish for improved corrosion resistance and wear.
• The included cam pin is 17-4PH stainless, domed and hardened for reduced friction.
• This BCG is offered with a lifetime warranty and is made in the USA.

Built to provide mil-spec compatibility with a few targeted upgrades, the M-SPEC BCG is a practical component for builders and maintainers who want a durable, hard-finished bolt carrier group for 7.62/.308 AR-10 style rifles. Its combination of treated 8620 carrier, Carpenter-class bolt construction, and QPQ nitride finish yields a robust part well suited to routine range use and reliable function in a variety of duty and recreational applications.