I machined a few mods for my .25 Gauntlet 2. I removed the shroud and got rid of the plastic air stripper and machined three delrin spacers with o-rings at each end, they are about 3 in. long to stabilize the barrel inside the shroud. I made them as a tight slip fit on the barrel and after positioning, them in place I put a ring of clear fingernail polish on the barrel at each end of the spacers, the polish adds a couple thousands diam. to the barrel which prevents them from moving when removing the shroud, I got rid of the spring and plastic cones and made some aluminum cones to take their place. I made a threaded end cap for the barrel and machined a 6" aluminum moderator from a piece of solid aluminum bar stock and machined some K baffles from solid aluminum. It definitely shoots better than before and it is a lot more quiet now.