i have a k80 and the bottom barrel choke thhread is a bit tight to get the choke into. i spoke to a guy who told me of a tool you can buy to clean and re-cut the factory thread. anyone know of such an item and where to get one? thanks des
Send it to Krieghoff and have them do it with the proper tools. If you crossthread it, repair is going to be VERY expensive or impossible, and I doubt you can buy a tool that will to as good a job as the tools Krieghoff owns.
I use a 10 gauge brass brush chucked up in a cordless drill and run it in reverse after I jam it straight in half way past the threads. It just unscrews itself along with any crap in the barrel threads.
One of the ways we deal with a flat thread in industrial maint. is to unscrew it about a quarter turn from tight and tap it straight into the barrel using the butt of a hammer handle. Then loosen it another quarter turn and repeat, until you've done it for a couple of full revolutions. Failing that, send the barrel to Ottsville inside a piece of PVC pipe with threaded end caps and lots of bubble wrap around the barrel and a dish towel inside each end of the tube.