I have a like new. Only mounted for one week Quad Rail Aluminum Free Float Tube. It is CAR Length. Just to confirm it is approximatly 7" in length. I paid 120.00 for it and would like to get 100.00 shipped. Or Trade for AR15 or AR10 parts. Or also trade for ??. No AR15 mags please i have plenty. It was from Rock River but is Marked YHM.