I really like the tool-less design of BoreBuddy's Gen 4 Adjustable Weight, so this is a shameless copy with some minor changes for printability in mind.
I highly recommend purchasing Bore Buddys' weight, but if you don't have the cash right now, this is your alternative.
Includes a 4 & 6mm hole version and a hollow version.
If you have fitment issues with the 6mm hole, use a 1/4" drill bit and carefully ream it out. after that there was plenty of room for a 6mm tungsten rod to slide in.
LBRY Tags: 3d2a; ar22; frt; bolt weight; cmmg