Featuring a '"PMX" polymer matrix construction the PSA 35 round 9mm series magazines, combine an engineered thermoplastic magazine body with inserted stainless-steel feed-lips. Providing users with improved performance and reliability. Features:Impact & chemical resistance engineered thermoplastic body.Insert molded 17-4SS feed-lipsAnti-tilt self-lubricating follower.Impact resistant floorplate with and elastomeric strike plate. Materials:Magazine body : Custom compounded engineered NylonFollower : DelrinFloorplate : Super tough NylonFloorplate lock : Super tough NylonStrike-plate : Thermoplastic ElastomerFeed-lips- 17-4 Stainless SteelPalmetto State Armory offers magazines specially designed for seamless compatibility with the AKV, ARV, and JAKL9 platforms.