I just tightened the barrel grub screws that came loose. I noticed a third, threaded hole at the front of the pic rail, no screw in it. Can someone tell me what that hole is for?
I guess my next question is, is there a way to tighten the shroud onto the barrel? Wit the barrel grub screws tightened the shroud is still a little loose. Around 1/4 inch of play forward and back, and also able to twist a little. I would think that would degrade accuracy some??