TTRIGGER provides greater "real-world" gun practise without the need to visit a range or spend a house payment on sufficient ammunition. TRIGGER is a dry fire magazine that uses your own gun and installs in seconds. Insert the mag and practice anywhere. If your goal is to protect yourself and learn self-defense in a gunfight. We are providing TTRIGGER Spring Kit and complete online training.For more information visit our website at www.ttrigger.com