I bought a sub2k, 40cal, gen 2. At the range, it preformed well with the poor sights furnished. I thought I could improve the accuracy and use it for night hunts with a light and a scope. (The folding aspect is not too important to me; I liked the lightness for carrying on my ATV). I bought a rail riser and put a long eye-relief (pistol) scope on it. Accuracy went to hell. I could get 2 inch groups at fifty yards, but when I tried to bring the group to POI, shots were everywhere, even missing the paper plate target. Working with it, I could get the group size back down, but sooner or later, the groups would open up again. I thought it must be the cheap scope not holding zero, so I got a NIKON for $189. Still very erratic performance. I have decided that the forearm must be the problem. The factory sights are mounted on the frame and the barrel muzzle, but the scope rides on the forearm. What do y'all think? Is my forearm wiggling around? is there a solution? Will the Red Lion forearm solve my problem, or should I just put the factory sights back on and keep it as a daytime shooter?