Better test that puppy on a 308 as I had my BB vibrate loose and fall out of the gun. The store that installed it said they had "never seen that before". I asked if they used loctite and they said "no". I have since used loctite and it is staying put.
These kind of quick changes make me very nervous as I do not trust the police one bit to not jack with screw and hit you with a felony.