I don't, I was wanting a CZ 455 varmint with thumb hole stock and the only one I could find has a 16" barrel with the threaded end for a suppressor or a muzzle brake. The factory end cap looks hideous, so you can only hide the threads with a muzzle brake or a nice fitted end cap that would have to be made. I passed on this rifle after realizing that the threads were 1/2x20 instead of the 1/2x28 common thread. I ended up buying the CZ 455 Varmint with the heavy 20" barrel and will put the thumb hole stock on it from Boyd's.