So dug up my old stuff mine was got through primaryarms.com
Other than the muzzle device to make it a suppressor host the changes I've made were: added a noveske sling stud/bipod mount (and a Harris brms), switched out the stock with a sopmod (to try and balance the gun more rearward).
No idea what other parts are compatible, I'd be glad to use my calipers and pull any measurements to help others on the fence.