An extended 20-rd magazine for the M92/M9 pistol in 9mm. Constructed from heat-treated blued-steel with a follower lock-plate and base-plate molded from a proprietary DuPont Zytel based black polymer; and using a spring wound from Chrome-silicon wire and heat-treated for strength and reliability. The magazine has an o/a length of 6.5? with a molded sleeve to fill the gap between the bottom of the grip-frame and the magazine base-plate.NOTICE: This magazine may or may not fit Beretta CX4 Storm Carbines. Consumers should check with Beretta for confirmation of which series of magazines their CX4 Storm Carbine was manufactured to accept.Made in The U.S.A.