free float tube

Re: free float tube

Depending on which tube you get, some mfg's make swivel kits for their tubes. Many of the tubes come pre-drilled/tapped for a screw-in stud...Armalite is one example (including offering accessory picatinny rails that attach at 12, 3, 6, and 9 o'clock).
 
Re: free float tube

I have a Bushmaster V-Match upper with no swivel stud for the bi-pod. I plan on drilling and tapping the tube and just installing a stud. If the tube isn't thick enough i will just put a nut on the stud with some loctite to hold it in place