Update: Confirmed to be working. Needed to basically bore out with 3/8ish (10mm) drill bit. Feed ramp from ez22 fits fine. I just used a little jb weld to attach it.

Trying to work out a collar for a dedicated ar22 or dedicated 22 proto barrel to work with the EZ22. I'm too cheap to buy one so I tried to make one to work with an extra ScARpion 22 proto barrel I had. You will more than likely have to bore out the hole a little to fit over proto barrel and possibly on the back side to make it sit flush. Uses EZ22 feed ramp but could need a little off the back to sit flush. If I like the design and it works I'll try to make changes to the model for less post processing but my cad skills are very limited.

LBRY Tags: ez22; proto barrel; ar22; 3d printing; 3d2a