I've put a couple accu's on newer centerfeed guns that did not come with them. They take some tweaking but work just great. I like the SSS trigger more but you can't beat a cheap accu-trigger. You'll have to pay a lot of attention to getting the safety set just right with the adjustment screw. Just make sure you test the heck out of it before you take it out to the range. Same goes for the SSS installed trigger. I will say though that the last SSS trigger I got through Brownells was very roughly machined. There were tooling marks all over and the back of the trigger that the bolt release rides against made some bad noise because of how rough it was. It works well but wasn't near the quality of the first one I got a couple years ago.