PSA multi-cal lower, smith/wesson upper chambered in 5.45x39. (Not .556 NATO) exceptional shooter. Comes with backup sights red/green dot and magpul furniture. 410 rounds of mostly 7n6 ammo Russian and Ukrainian. Some (60ish) red army ammo mixed in. 2 steel 545 mags. Will sell gun alone for $600. Can meet at Academy on Gold canyon/1604. Text is best 210-254-7531