Riding the safety on a USP is not a good idea. It can and will de-cock the gun when it recoils. Happened on my USP 45 and others.
There are no aftermarket safeties that I'm aware of.
I would recommend either changing your habit of riding the safety or swapping out the detent plate and converting the gun to variant 9, safety, no de-cocker.
There are no aftermarket safeties that I'm aware of.
I would recommend either changing your habit of riding the safety or swapping out the detent plate and converting the gun to variant 9, safety, no de-cocker.