LMT Defense Semi-Auto 5.56 Bolt Carrier - R-L7A3A / L7A3A Features The LMT Defense Semi-Auto 5.56 Bolt Carrier (R-L7A3A) is a precision-machined, mil-spec quality carrier designed for direct impingement AR-15 platforms. This is the carrier only - does not include the bolt, firing pin, cam pin, or retaining pin - making it ideal for custom builds or as a replacement part. Manufactured to LMT's legendary standards and test-fired at the factory, it offers reliable function across multiple calibers including 5.56 NATO, .223 Remington, .300 BLK, .204 Ruger, and 6.8 SPC. The carrier features standard semi-auto geometry optimized for smooth cycling and long-term durability in semi-automatic rifles. Specifications Manufacturer: LMT Defense (Lewis Machine & Tool) Model: Semi-Auto 5.56 Bolt Carrier SKU: R-L7A3A / L7A3A Caliber: 5.56A-45 / .223 Rem (.204 RU, .300 BLK, 6.8 SPC compatible) Weight: 0.566 lbs Operating System: Direct Impingement Type: Carrier Only (semi-auto profile) Finish: Manganese Phosphate Compatibility: Standard AR-15 / M4 uppers Why the LMT Defense Standard Semi-Auto 5.56 Bolt Carrier? LMT's semi-auto carrier provides unmatched reliability and longevity for your AR-15 build or repair. Its precise machining ensures consistent lockup and smooth operation, reducing wear on other components while maintaining factory-level performance. Ready to upgrade or repair with genuine LMT quality? Add the LMT Defense Semi-Auto 5.56 Bolt Carrier R-L7A3A to your cart at Battlehawk Armory today.