I purchased this German surplus 26.5mm flair gun last year. Then the 45lc/.410 insert this past fall. It hits what you point at more or less. if your within 10yards. That works for what I got it for originally (copper heads/rattlers) But the more my friends and I shoot it the more I want to use slugs/buck shot/ 45lc. For things like coyotes or a last ditch gun around the house. It's also technically a "ghost gun" until I post pics of it all over the Internet ;-) Anyway the goal of this is to simply make this versatile pistol more functional. And therefore more fun. For as cheap as possible. First I found an old piece of CPVC lieing around. ID is less than the OD of the gun barrell. (This is intentional) To get a good tight fit that is still adjustable I used a hack saw and cut a slot in the bottom. Then used a pair of pliers to open and slide over the barrel. Second I orderd a tru-glo fiber optic threaded shotgun bead from amazon. $12.36 Next I drilled into the pipeing. Starting small and slow until I had a final hole of 3/32. Finally I threaded the bead slowly into the pipe. The fiber was loose in the frame after handling so of you are doing this I recommend a small drop of clear super glue. I adjusted it by eye to center. Next I will try and see where it hits. With a slug or buck from 10 or 15 yards. Would love to use some 45lc but it's just to expensive around here. After I get it sighted. I'll either cut a notch at the rear. Put a line or two dots. When I am happy I'll epoxy it In place. Loc-tite the bead threads. And paint it to match the gun. Stay tuned if you're interested.