Drop-in replacement for factory magazine catch has a deeply serrated button that protrudes farther from the frame to ensure positive, fast mag release on the first try. Gives a small but critical performance edge to the practical pistol competition shooter. Fits all 9mm, .40 S&W, .357 SIG, and .45 GAP Glocks. Same length as the factory catch on the G20, 21, 29, and 30, so it can be used as a direct replacement for the original part. Mfg: Lone Wolf Dist. SPECS: Reinforced, molded polymer, matte black. Fits Glocks chambered in 9mm, .40 S&W, .357 SIG, and .45 GAP as an extended catch; factory-length replacement for G20, 21, 29 and 30. Does not fit G36.