I'm not sure if I got a lemon, but mine cannot and will not lock onto the flash-hider as designed. It comes off with next to no force, it came right off when I was trying to take the suppressor off of the flash hider on the end of my WE Scar H GBBR. I don't think I'd trust it to handle the recoil of my airsoft gun. It also had extreme wobble on the flash-hider. Pros - Looks pretty sweet Cons - Does not lock as advertised - Wobbles side to side as well as up and down quite substantially