Full-auto bolt carrier with enhanced bolt assembly. The LMTA(R) Enhanced Bolt provides the following: Built from a proprietary material that is not only stronger than the standard bolt but easier to clean as well Modified locking lugs provide flexibility and durability in dealing with high-pressure, overgassed loads "Lobster tail" extractor utilizes two springs to allow stronger and more consistent extraction with drastically improved spring life Specifications: Weight: 0.72 lbs Caliber: 5.56x45, .300blk Operating Method: Direct Impingment Bolt Carrier Group