This muzzle brake is threaded in ½ UNEF (½-28) The brake is a 32 flute setup. From the barrel it is 22°, then arches back down 45° to symmetricly counter the already lack luster recoil of a 22LR. 

A bit of caution is advised, the design of this will redirect the gasses back to the operator. Non-Jacketed lead rounds are discouraged to reduce lead exposure. This will not strip a jacket off. 

It is highly recommend to chase the threads to clean them up and brass brush the bore. You can print that fine, but you better have your printer and filament dialed in; including your shrinkage. 

Print using nylon of PPS. I use this filament, and recommend it. I also clean it up then follow Polymaker's TDS for annealing. 

The print profile is geared for a G10 plate. If you use PEI, add a square to the object and squish it down to .10 tall and twice the diameter. Set the new squished square object as PETG to get the nylon to stick to PEI; it will peal away easily after the print. Makerworld is blocking me from uploading any plate where I set the PETG square for the nylon now. Do not change the orientation.