With a sole focus of producing a reliable magazine that can withstand wear and tear, SGM Tactical utitlizes innovative technology for optimal performance. Innovative engineering provides a design that is manufactuered from durable, Dupont composite/glass-filled polymer that is internally slick and delivers fast feeding performance. The magazine features heat treated continuous sheet metal lining, along with a coated, stainless steel spring that is longer in length to provide a more uniform pressure and moisture resistance for additional dependability. This SGM Tactical Glock 17 magazine possesses a redesigned +2 capacity floor plate, bringing the total magazine capacity to 33 rounds of 9mm.Note: MkGs platform lower receivers are designed around OEM Glock magazines, as a result, the SGM 9mm follower may not line up with CMMG& last round hold open linkage.