My 12.5 Grizz came threaded for chokes - it has the ghost ring sights though - they're pretty high, lot of sharp edges on the front. Nothing a dremel couldn't fix if you're motivated.
The website says they are all fixed cylinder bore now, which is a crying shame. Oh well. Epps says they will thread a bbl for $100. There might be some place cheaper, dunno.
I went with the bead sight because it's snag free and because I want to be able to put on a waterfowl barrel from time to time without having to unscrew the ghost ring assembly.





















































