TTRIGGER Dry Fire Training Magazine. Are you ready for more accuracy, superior confidence and better handling with your Glock? Well buckle up, because from the moment you unpack your TTrigger dry fire mag , you’re only 5 minutes away from a practice that will truly prepare you for anything. Remember, for LESS than the cost of 2 boxes of ammo, you can get a tool that’ll give you thousands of trigger pulls for almost nothing!____________________FEATURES:No More Racking the Slide to Reset the TriggerPractice Double TapsBuilds Proper Muscle MemoryProvides Audible & Tactical Trigger SimulationDoes Not Use Pistol’s Firing PinPays for Itself in Ammo SavingsPractice Safely in Your Own Home____________________COMPATIBLE GLOCKS:9MM: G17, G19, G19X, G26, G34, G45, G47.40 CAL: G22, G23, G27, G35.45 GAP: G37, G38 , G39.22 CAL: G44.357: G31, G32, G33