Barrel: 7.5" Chambered in 300AAC Blackout, with a 1:8 twist rate, M4 barrel extension, and a pistol length gas system. This nitride barrel is finished off with a PSA 9" Lightweight M-Lok free-float rail, .750" diameter low profile gas block, and a fluted flash can.Flash Can: Palmetto State Armory's Fluted "FLASH CAN". This is a solid 6061 aluminum device that is designed to direct muzzle gases and the muzzle flash forward. Threaded 5/8-24 for 300 AAC Blackout. Black military-style hard anodizing. THIS DEVICE IS NOT DESIGNED TO REDUCE RECOIL, MUZZLE RISE, OR FLASH SIGNATURE. This device is designed to direct gasses and noise forward away from the shooter and enhance the weapon's appearance. Upper: Forged 7075-T6 A3 AR upper is made to MIL-SPECS and hard coat anodized black for durability. These uppers are made for us right here in the USA by a mil-spec manufacturer. Bolt: Bolt is made of Mil-spec shot-peened Carpenter 158 steel. Gas key is secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is parkerized outside, and chrome lined inside.