BCI DEFENSE LLC Professional Series BCI 501-0001SG SQS15 Professional Series Semi-Automatic 223 Remington/5.56 NATO 16" 30 1 6-Position Blk Stk Gray Cerakote The BCI SQS 15 Professional series rifle features a semi-automatic action, a enhanced combat trigger, and a ambidextrous safety. It has a barrel length of 16.0" that is constructed of forged 7075 T6 aluminum with a 3 prong flash hider muzzle and a rate of twist of 1:8". The receiver is made of nitride with a metal finish in gray cerakote and a 6-position black synthetic stock. It weighs 6.45 lbs and has an over all length of 33"-36". SPECIFICATIONS: Mfg Item Num: 5010001SG Category: RIFLES CENTERFIRE TACTICAL Action :Semi-Automatic Caliber :223 Win/5.56 NATO Barrel Length :16" Capacity :30 1 Trigger :Enhanced Combat Trigger Safety :Ambidextrous OAL :33"-36" Weight :6.45 lbs Stock Description :6-Position Black Metal Finish :Gray Cerakote Muzzle :3 Prong Flash Hider Receiver Material :Forged 7075 T6 Aluminum Sights :None, Optic Ready Barrel Description :Nitrided Twist :1:8"