XTech Tactical MTX Magazine for Glock Features The Xtech Tactical MTX Magazine starts from a steel reinforced magazine body and adds a proprietary baseplate extension bringing total capacity up to 20 rounds of 9mm a meaningful increase over the factory 15 round Glock Gen4 magazine. A 17-7 stainless steel spring is matched to this extended capacity maintaining consistent spring tension across every round in the stack rather than losing reliability as the extension adds length. The Delrin follower includes a no stick additive helping rounds glide smoothly up through the magazine body during feeding. This combination of materials is designed to outperform the factory Glock components it replaces. Steel reinforcement throughout the magazine body adds rigidity and durability well beyond standard polymer construction helping the magazine hold up to repeated loading unloading and use at the range. The magazine is compatible with everything that fits a standard 15 round Glock style magazine giving owners a drop in upgrade path without needing other modifications to their pistol. Made in the USA the MTX Magazine reflects careful attention to materials and assembly quality throughout. For Glock Gen4 owners who want more rounds on tap without sacrificing reliability this magazine is a straightforward capacity upgrade. XTech Tactical MTX Magazine for Glock Specifications Manufacturer: XTech Tactical Model: MTX Magazine Caliber: 9mm Capacity: 20 Rounds (15+5) Compatible Hosts: Glock Gen4 Spring Material: 17-7 Stainless Steel Follower Material: Delrin Country Of Origin: USA Available At: GrabAGun