LanTac M-Spec BCG 7.62 Nitride – AR-10/SR-25 Pattern Rifles

The LanTac M-Spec BCG is a mil-spec bolt carrier group designed for reliable cycling in 7.62 NATO/.308 Winchester AR-10 and SR-25 pattern rifles. This is a direct replacement for factory bolt carrier groups, offering improved corrosion resistance and reduced friction through its nitride finish. Shooters looking for a dependable spare BCG or an upgrade from a basic phosphate carrier will find this a solid choice for duty, hunting, or range use.

The carrier and bolt are machined from 8620 steel and Carpenter 158 steel respectively, then treated with a complete nitride finish that penetrates the metal surface rather than coating it. This results in a harder, slicker surface that resists wear and simplifies cleaning. Gas rings, extractor, ejector, and firing pin are all included. Installation is drop-in for anyone familiar with AR-pattern rifles—no gunsmithing required.

• Part Type: Bolt Carrier Group
• Compatible Firearms: AR-10, SR-25 pattern rifles in 7.62 NATO/.308 Winchester
• Material: 8620 steel carrier, Carpenter 158 steel bolt
• Finish: Nitride (complete coverage)
• Installation: Drop-In
• Includes: Bolt carrier, bolt assembly, gas rings, extractor, ejector, firing pin, cam pin, firing pin retaining pin