Decided I'd had enough of my POI changing every time I slightly tightened or loosened the shroud, or installed or removed my DonnyFL. So, I bought a section of carbon fiber tubing (16mm ID x 18mm OD), and used that as a non-functional shroud. The adaptor was purchased on eBay from EagleVision (model KGB-2), and the moderator is a DonnyFL .25 caliber Tanto. The gun is about as loud as it was with the stock shroud. FYI, I had tried the o-ring hack, and that was good for temperature changes and such, but the POI still changed when tighten or loosen the shroud or moderator. This way there is no tension at all on the barrel, and the gun is every bit as accurate as it was prior - which is to say, its a laser beam. Skinny shroud is CF. Adaptor and Tanto are CF wrap.