The 50-round 9x19mm Glock pattern drum features KCI's proprietary polymer construction and steel internals. The ratcheting load assist lever provides efficient and easy loading. This magazine is not designed to be used with hollow point ammo. For use in Glock patterned pistols. Glock 17 / 17L / 19 / 19x / 26 / 34 / 45 / 47