If your gun isn' t cut and threaded inside the muzzle for choke tubes, they aren' t an option. If you are serious about using that gun, you may have to get a new barrel that is threaded for tubes. Check out you gun with some turkey loads first though. I killed quite a few turkeys with an old model 97 Win. pump when I started. It had a pretty tight choke already. I used it out to 40 yd. effectively.