Lantac M-Spec 5.56 AR-15 Bolt Carrier Group - Nickel Boron

Above mil-spec performance at a sensible price -- the Lantac USA M-Spec 5.56 Nickel Boron BCG takes the military specification as a starting point and adds NiB coating, a domed CP-R360 cam pin, and precision hard-turning for a bolt carrier group that outperforms standard phosphate mil-spec components.

Features:

• Full-auto compatible M16 carrier
• Chambered in 5.56 NATO / .223 Rem
• 8620 steel carrier, heat treated, hard turned and ground
• 9310 steel bolt, shot-peened, MPI-inspected
• Nickel Boron (NiB) coating
• CP-R360 domed cam pin, 17-4PH stainless, H900 hardened
• Properly staked gas key
• Lifetime warranty
• Made in the USA

Nickel Boron coating replaces standard Type M phosphate for improved corrosion resistance, lubricity, and easier cleaning, often allowing for reduced lubrication compared to phosphate-coated BCGs. The CP-R360 domed cam pin reduces friction and wear against the upper receiver walls at one of the highest-stress contact points in the upper receiver.

Ideal for budget-conscious builders who refuse to sacrifice quality, as a drop-in replacement for worn BCGs, or for shooters who want above-spec performance at an accessible price.

Lantac USA manufactures precision AR-15/M16 pattern components -- rifles, muzzle brakes, and more -- backed by a lifetime warranty and made-in-USA manufacturing standards.