.177 caliber BBs or pellets only Velocities should not exceed 650 fps Target incorporates double-ply foam in front of metal plate to stop/slow projectiles Comes with 2 (two) shot and see targets.5" x 18" x 5" For use with .Additional targets can be purchased separately (item codes PY-A-5698, PY-A-4343 and others) Air Venturi BB Bandit Target 12.