CMMG .22LR Uppers & Magazines

[FromMyColdDeadHand]

I have one of the Boonie Packer adaptors. Works as advertised.

I put a s&w mag in an ar lower and it doesn't seem too secure

I have a Boonie Packer adaptor too and the SW M&P15-22 mags fit fine. Do you have an upper on?

One thing that I will say, is that you need to mod a charging handle. A standard one will end up getting brass caught between the CH and the bolt. Filling it is with a bit so it is slightly concave to allow the bolt to move freely is needed. I used some JB weld, I think there is actually a dedicated CH for this purpose, but I had a bunch of spare CHs from upgrading older rifles.

[Great-Kazoo]

I have a Boonie Packer adaptor too and the SW M&P15-22 mags fit fine. Do you have an upper on?

One thing that I will say, is that you need to mod a charging handle. A standard one will end up getting brass caught between the CH and the bolt. Filling it is with a bit so it is slightly concave to allow the bolt to move freely is needed. I used some JB weld, I think there is actually a dedicated CH for this purpose, but I had a bunch of spare CHs from upgrading older rifles.

Yes the 22 CH's are filled in with a very mild relief cut. You could use some of that black silicone, for making gaskets . That stuff adheres to anything.