Matt, I don’t know if you were addressing me or Imold Jim. Yes, the end cap of the bully just unscrews, but you need to get one of his adapters. I would send you a link, but once you go on Donny’s site it’s self explanatory as he lists what the adapters are for as far as gun makes.
now, I have to tell you as part of a learning experience thru Imold and Donny, if your velocity is above 900 FPS get the Emperor model as Imold did. His is ultra quiet and he’s pushing the factory speeds. If under 900, get the Shogun or what other make Donny offers for a 30 cal. If you do order a Shogun, ask Donny to ream out the exit holes on his moderator to .357. Mine was pellet clipping with the standard hole so I had him enlarge it. Not a fault of Donny’s, but what Donny explained makes sense. It’s all about paying attention to tolerances and concentricity, and maybe mine didn’t come that way from the factory.
im actually borderline at 870 FPS. Took me 12 whole turns counterclockwise on the hammer spring to drop it to that speed, and the sweet spot is at 2900 FPS, so I only fill to 3000. I’m good for at least 20 shots at that velocity. My Shogun did help some, but still a bit loud. I think even at 870 I should be bumping up to the Emperor. I swapped out the media that Donny uses inside his Shogun for a white styrophome wrap, the stuff plumbers wrap their riser pipes with before a concrete slab pour to protect their ABS pipes by adding cushion against the concrete. Helped big time in reducing the rapport. The other night I took out the factory bully baffles and wrapped them with the same material. Haven’t shot the gun yet to see, but I’ll let you all know for sure.