Phoenix Arms HP22A is a single action semi-auto 22LR pistol with a staggered 10rd magazine that makes for a compact and comfortable fit in the hand. Weighing in at just 20 ounces features include 3" vent rib barrel, serrated trigger, adjustable rear sight, magazine interlock with a manual slide hold open, external hammer and firing pin block safety. Designed for standard velocity target ammunition.Phoenix Arms model HP22A is a single action semi-auto .22lr caliber pistol with a staggered 10-round magazine that makes for a compact and comfortable fit in the hand. Weighing in at just 20 ounces in a size 4.1 by 5.5 inches, features include 3-inch vented rib barrel, serrated trigger, adjustable rear sight, magazine interlock with a manual slide hold open, external hammer and firing pin block safety.