XPA-12 Series XPA-12 offers both semi automatic and pump action operations on a single shotgun. This means, you will have both a semi automatic anda pump action shotgun at the same time. XPA-12 is a 12 gas operated shotgun with a 76mm (3″) chamber. This shotgun will cycle with any load from 24 grams (7/8 02) to heavy magnums. On semi automatic mode, this shotgun operates like any other gas operated shotgun and on pump action mode, you cycle it manually. There are 2, 5 and 10-round magazine options depending on your needs. Ergonomics and modern design moves it ahead of the competitors. Designed and manufactured as a result of long R&D work, ERMOX XPA-12 semi automatic and pump action magazine fed shotgun aims to offer maximum quality and pleasure that can be offered by a shotgun.