These 10-round magazines are crafted from durable steel with chrome silicon internal springs and tough Zytel polymer followers/baseplates for maximum durability and service life. Constructed from heat-treated blued-steel Follower, lock-plate, and base-plate molded from a proprietary DuPont Zytel based black polymer Spring wound from Chrome-silicon wire and heat-treated for strength and reliability Compatible with Smith & Wesson M&P Compact .40 10 Round capacity
