tuners and brakes work . i have two different brand models EC Tuner brake and from Adaptive Tuning System . the only problem i have with the EC T is than no one wants to shoot next to anyone when a brake is used . its a common problem with all muzzle brakes , not only the blast but dirt that can be kicked up, we don't like that at all. kinda wondering why ranges don't accommodate with barriers between shooters and .mat's with no dirt on them.