don't be afraid of a saw is my advise. My 870 has been cut down about 5/8" As little as that is, it cut recoil pain by about %95. Recoil feels the same actually, but I can shoot 200 rounds of 12 gauge and not hurt. Before the cut, it was about 20. Full length factory stock 20 gauges hurt far more. Its strange, but nearly everyone I know refuses to fit their shotgun stock, because of some ego thing. They think if they need to cut the stock, they must be "below average" in some way. They also pretend they don't need to, because it "shoots great and doesn't kick" Of course they're lying to me and themselves. So they rarely shoot, because it hurts, and miss when they do. A good fitting stock is a great recoil reducer.