Palmetto State Armory AR15 Features Barrel: 18" 416R stainless steel barrel, chambered in .223 Wylde, with a 1:7 twist, and a rifle-length gas system. The barrel is finished with with a .750" diameter low-profile gas block, PSA 15" Lightweight M-Lok Free Float Rail and an A2 flash hider. Suparms adjustable gas block Sig Sauer red dot ROME078 scope Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring M4 feedramp cuts, these upper upper receivers are made for us right here in the USA. Bolt Carrier Group: For AR15 and M16 rifles and carbines. Bolt is made of shot-peened, Mil-spec Carpenter 158® steel. Gas key is secured with grade 8 fasteners and staked. Includes Charging Handle. Lower Build Kit: PSA MOE EPT Lower Build Kit, Black Details Barrel Length: 18" Gas System: Rifle-Length Barrel Profile: A2 Barrel Steel: 416R Stainless Steel Barrel Finish: Stainless Muzzle Thread: 1/2-28 Chamber: .223 Wylde Twist Rate: 1:7 Diameter at Gas Block: .750 Gas Block Type: Suparms adjustable gas block Sig Sauer red dot ROME078 scope Muzzle Device: A2 Flash Hider Receiver Material: Forged 7075 T6 240- rounds 223 ammo 2 -10 round clips 2- 30 round clips