I've got a spare trigger from a 700 p .300 win mag that I replaced with a Jewell when I had it rebuilt and upgraded. I've also got a sps Tac .308 with that crappy xmark pro. It SUCKS. the trigger from the P was really not bad so I'm wondering if I could replace the Tac xmark with the P. only concern is will a trigger from a LA fit on a SA. Thanks AS