Ya. I got radical and used a Dremel to put a 11* recessed target crown on my Mini barrel. I dressed a grind stone to
match the profile and it worked out real nice.
Before that I had it cut and threaded 12-28 for AR compensators. That was done by a gunsmith. he silver soldered an M14 style sight on and a machinist friend made me a long M14 style flash hider, so now it looks much like a real M14.
I filled in my fiberglass stock where it was cut for the M14 select fire switch, I should have bought the fake selector switch and installed it, make my M1A look like an M14, it would have been nice to have the full auto option but I would never need it, not in .308 anyway.