The LMT Semi-Auto 7.62×51 NATO Bolt Carrier Group (LMT part no. R-LM308D) is machined to the LM308SS semi-auto profile for LMT’s MWS 7.62×51 upper receiver platform, giving a direct-fit replacement or spare BCG for AR10-pattern .308 rifles. LMT builds these carrier groups to the same tolerances used in its complete MWS rifles, so reliability and headspace stay consistent with the factory setup. A properly fitted 7.62×51 bolt carrier group is essential to keeping a heavier-recoiling .308 AR10 build running smoothly. This carrier group is intended for semi-automatic rifles only.

Key Specifications

• Machined to the LM308SS semi-auto profile, matching LMT’s MWS bolt carrier dimensions.
• Chambered for 7.62×51 NATO, compatible with standard .308 Winchester ammunition.
• Finished in a durable mil-spec coating for corrosion resistance.
• Built by LMT Defense to the same spec as its factory MWS rifles.
• Compatible with LMT’s MWS 7.62×51 upper receiver platform.

Frequently Asked Questions

Does this bolt carrier group fit any AR10? It’s built specifically to LMT’s MWS bolt carrier dimensions, so best fit is confirmed in an LMT MWS upper.

Is this carrier group rated for full-auto use? No, this is the semi-auto LM308SS profile; LMT also offers a separate full-auto profile carrier group.

Buy the LMT Semi-Auto 7.62×51 NATO Bolt Carrier Group

Shop the LMT Defense bolt carrier group in our AR bolt carrier groups selection, with fast, insured shipping from our Lubbock, Texas gun shop.