LanTac USA LLC SF 15 Patrol, Optics Ready, Semi-automatic Rifle, AR-15, 300 Blackout, 14.5 Barrel with a Pinned and Welded Lantac Dragon Muzzle Brake that Brings the Barrel Length to 16, 1:8 Rifling, Matte Finish, Black, Magpul MOE Stock, M-LOK Free Float Handguard, ALG Single Stage Trigger, 30 Rounds, 1 Magazine 01-FA-300-PAT 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.