ltwguns.com

Exactly. Where the bulge is, being larger in diameter, it would get too tight in the unthreading of the comp and its long gooseneck.

What is your opinion of the replaceable breech face inserts that SVI markets for some of their slides?

Clever design and no doubt made to a high standard although I've never actually seen one. Another threaded thing to come loose I suppose. So, LocTite it and then it might be difficult to get out. To repair something damaged without getting a whole new slide might be its best use....? On say a slide that had a ton or work into it. But getting that cut made on a non-SVI slide would be a hurdle / expense. There might some big thing I'm missing here and I would incorporate pone if spec'd by a customer but other than that, I have not given them that much thought.