ProMag Bersa Thunder 380 Black 380 Auto (ACP) Handgun Magazine - 7 Rounds - This 7-round magazine is made from heat treated blue steel with a follower, lock-plate, and base-plate molded from a DuPont Zytel polymer. The spring is wound from Chrome-silicon wire and heat-treated for strength, reliability, and durability. Fits: Bersa Thunder 380, 383A, Series 95 and Firestorm 380 ACP pistols 7 round capacity Heat treated blue steel