I got this for my CEDA Omni because the waffle head full length darts that get used at my larp game get stuck in the stock barrel. The barrel is thin but strong plastic and the outer diameter fits the Worker muzzle break style cap I purchased as well. Barrel was very easy to cut down, but don't use a pipe cutter like I tried at first because it will just end up bending the plastic. I ended up just using a utility knife and then sanded the cut and that worked very well. There is about 2mm of space on all sides around a Dartzone waffle head dart so if you use this barrel without an inner barrel the only seal in a CEDA Omni is going to be the breach. Performance for the CEDA Omni is already lacking and with this barrel is even less. Overall happy with my purchase and it solved my problem. Now I just need to upgrade everything else on the CEDA Omni to get some more performance.