I wa tired of my left index finger knuckle bumping the ambi safety up every 5th round so I replaced the ambi safety on my STI Target Master with a right hand only thumb safety. Thought I did a decent job of fitting it, the thumb safety works fine. But, while dry-fire testing I notice that once in a while the pulling the trigger will activate the hammer without me touching the grip safety. Also the grip safety feels like it's not under as much tension as before. Any suggestions on how to correct?
thanks