Gun started with a 20 inch barrel, had my gunsmith cut it to 18.5 and thread it to 5/8x24 with an 11° target crown. Scope is a leupold vx freedom 3-9 ar scope. Upper and lower are both PSA. Comes with 7 mags and 100 rounds of aac ammo. The ammo appears to have the same bullet as the Hornady sst. Had A supportive arms gas block installed. Have not shot it since the work, only shot by the gunsmith to tune the gas block. Only selling cause someone Stole the catalytic converter off my truck