The concept of the BULLET FORWARD SLIDE RELEASE came from DAVE SPAULDING -Thanks Dave! The BULLET FORWARD SLIDE RELEASE  is designed for aggressive manipulations (read gross motor execution) for positive slide releases and slide stopping power under the most adverse conditions. The Problem: Using the modern technique (thumbs forward) you can do one of two BAD things: 1. Your thumb can push UP the slide release locking the pistol open during recoil while ammo is still in the pistol. 2. Your thumb can FORCE the slide release down preventing the pistol from locking open when empty. The Solution: The BULLET FORWARD SLIDE RELEASE prevents these occurrences by placing the slide release tab forward and between your thumbs! This forward thinking enables you to dominate your GLOCK! This part is made with the finest Stainless Steel. Fits Only 3 Pin GLOCKs. Models: 17 (3 Pin Only), 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,33, 34, 25, 37, 38 & 39 Lifetime Warranty!