I was wondering if it would be legal to hunt deer with an SKS in Pennsylvania, where semi-autos can't be used to hunt, if the gas piston was removed. I've heard diverse opinions on this, one of them being that it would have to be a permanent alteration. Suppose a permanently altered extra gas tube would be satisfactory? Then comes the more important question, is it safe? I thought of pinning a rod in the tube through the two air escape holes if I was to use my existing tube, or solder it in if it was on an extra. Or maybe I could just set the blocking rod in and make it big enough to be snug, but not so big that I couldn't remove it. If I used a rod, what material would be strong enough? Or maybe I could get a square rod, cut it to length, drill the end for the gas block, and lock the other end like one would the gas tube.