I discovered that my AR shoots a better with the handgaurds off and the POI changes when I use the sling in the prone position. So I think I want to get a free float tube and mount a sling swivel to it. Anybody know were I can find a midlength free float tube without breaking the bank? All I the ones I can find are real expensive. I don't want an ultra cool railed one able to mount everything but the kitchen sink but just a piece of pipe.