The LA-SF15 is manufactured using the enhanced forged receiver sets that feature an internally flared magwell to assist in high stress reloading, a radiused cam pin recess and patented CP-R360 Domed Head Cam Pin fitted to the E-BCG, Enhanced Bolt Carrier Group that reduces wear and friction. The E-BCG also features enlarged and forward facing gas holes that vent gas away from the shooter and the Carriers flared tail enhances accuracy.Features :Barrel: 416R Stainless, Nitrided, 16, 1:7, .223 Wylde/ 5.56mm or 300BLK (1:8)Receivers: Forged Certified 7075-T6 AR15 Receivers, Internal Flared Magwell, Spotface TakedownFinish: Type3, Class2 Hardcoat Anodizing