Summary

The part is sized for 17/32" brass to slide in and be secured by adhesive for 50cal foam darts(dartzone/nerf standard).

This mod is intended for the hop up tab to be removed and the part to be glued into the pilots barrel for a permanent change but if you leave the hop up tab in place the part can fuction by staying in place with just friction from the hop up tab so it can be removed later.