LMT Defense - 5.56 Gen 2 Enhanced Piston Full-Auto Bolt Carrier Group - L7D3CPE

The LMT Defense 5.56 Gen 2 Enhanced Piston Full-Auto Bolt Carrier Group (L7D3CPE) is LMT's premium piston BCG designed for the MRP-L platform's short-stroke piston barrels. The Gen 2 enhanced design offers improved reliability, reduced carrier tilt, and cleaner operation compared to direct impingement BCGs — making it the top choice for professional shooters who demand maximum reliability in harsh conditions.

Full-auto rated for maximum durability, the L7D3CPE features LMT's enhanced bolt carrier geometry optimized for piston-driven operation. Phosphate-coated for corrosion resistance. Compatible with all LMT MRP-L piston barrel assemblies. This BCG is the heart of LMT's piston-driven 5.56 system.

Features

• Gen 2 Enhanced Piston design — improved reliability over Gen 1
• Full-Auto rated carrier — maximum durability and longevity
• Reduced carrier tilt for improved accuracy and barrel life
• Cleaner operation — eliminates DI carbon buildup in action
• Phosphate (Parkerized) coating
• Caliber: 5.56×45
• Compatible with LMT MRP-L piston barrel assemblies
• Made in USA by Lewis Machine & Tool