Originally Posted by AirH0g

Absolutely, in fact you don't need the tube at all. The JCS RVA is .875 in diameter at its smallest point, so you'll just need to sleeve it with some Al tube, drill out a small hole in the bottom of the stock and use the bolts that come with the RVA to secure it.

JCS RVA's were meant to have stocks attached, so there plenty strong. And you get an RVA to boot, just drill a hole in the back of the stock for access. Take out the original grub screw for the adjustment, and pop in a Phillips head replacement and you can use a screwdriver to adjust the velocity without having to remove the stock.