Plug for Glock 17,19,20,21,22,23,24,31,32,34,35,37 and 38 The plug is designed to close the open cavity at the bottom of the Glock grip. This will prevent debris from entering and reaching the trigger assembly and firing pin. Also eliminates possible snagging from open cavity. Used worldwide. Fits 1st, 2nd and 3rd Generation Glock pistols: 9mm models 17,17L,19,34. 40 S&W models 22,23,24,35. 357 Sig models 31,32. 45 ACP model 21. 45 GAP models 37,38. 10mm model 20. * Fit may vary between Glock models. ** Will NOT fit SF models or Gen 4, 5 pistols. Shipping Weight: 0.018 lbs.