Snaps into the opening at the rear of the Glock grip frame for a cleaner appearance, plus keeps dust, dirt, snow and water out of the gun. Creates a perfect location for adding extra weight to competition guns or to counter recoil on light, carry guns. Easily removed, does not alter gun. See specs for proper fit to your model of Glock. Mfg: Jentra SPECS: JP-1 Fits Gen 3 models: 17, 19, 22, 23, 31, 32, 34, 35. JP-2 Fits Gen 3 models: 26, 27, 33.. JP-3 Fits Gen 3 model: 30. JP-4 Fits Gen 3 models: 20SF, 21SF. JP-6 Fits the following Gen 4 models without backstraps: 17, 19, 22, 23, 31, 32, 34, 35. JP-7 Fits the following Gen 4 models without
