Tremendously useful, thank you! I'm in the UK and we can only have semi auto rifles in .22RF here. Have my eyes on a complete CMMG build but couldn't exactly pin the dealer down on whether last round hold open worked or not (busy day) so this clears things up. Looks like the 15/22 mags are ultimately the way to go.

Have been firing Smith & Wesson M&P 15-22 with 10 round mags for several months, maybe 1,000 rounds. I’m in Texas, but use the 10 round mags by choice. So far rifle and mags are flawless. I’m using CCI AR TACTICAL 22 LR ammo. A fun rifle + economical 22 ammo.

I got my wife the cmmg 22 kit for her ar 15..got 1 25 rd cmmg mag..and ordered a 25rd black dog..both had issues feeding..after a little r + d..i found a small piece of self adhesive felt..about 3/8 square.. applied to the front of the mag ..about 1/2 into the mag well..took up any movement..now i did it to both mags.. built by different manufacturers.. and it took right off..no failures to feed..and the mags set at the right angle of attack..trust me. My wife shoots the hell out of the thing..so i had to make it 100%..be safe

The best info on the conversion mags...and very simple explanation! Thank you...

The S&W mags do not survive being left in a vehicle during Texas summers. We're 0 for 6 so far and all warped enough in the thin area around the thumb pull-down thing to be rendered useless in short order. S&W replaced all of them but they're not robust enough to be stored in extremely hot environments. They're good for training but that's about it.

This is exactly the info I've been looking for. 👌🏾 Appreciate the video

Great info, thanks! Looks like the new cmmg gen2 mags may actually have an addition that engages the bolt catch.

Thank you for your insight!! I have been searching for quite some time the perfect mag to use with my cmmg arc and think maybe you answered it. There was a mag that is my favorite that worked well with my cmmg conversion but that company is no longer in business. It was called Plinker or Plinkster Tactical. Work well with the arcatch22. It was the tightest fitting with no wobble when mag was inserted. In my experience with cmmg mags, the miss feeds and stove piping were caused due to a wobbly mag. I have 5 cmmg mags and regret buying them. So for them to function better , I have added layers of electric tape to shim the mag from wobbles. It works OK but will still get a misfeed from time to time. Not the best work around as the tape may fall off over time. Same with the black dog mags. I'm gonna buy a sw1522 mag and a stickon adapter to see how I like it. Hopefully this is the solution.

I just ordered the slip on magwell spacer. Looks like I won't have to duct tape my mags like some vids I have watched. Glad I saw Ur channel. I have no idea how Utube organizes them. Thanx in advance. RHK

Should have included the Tippmann M4 22 magazines.

Great info!

I only know or use the black dog/cmmg mags as I only use systems that use those ie----CMMG conversion, Sig 522, and Rock River 22 upper----which is what you need to distinguish as when your talking about mags---they are relevant to system as well lrbho with a elongated follower is still last round bolt hold open : it lets you know your out of ammo---but doesnt hold bolt back 15/22 are ok as a 22 rifle but they dont suit my purpose as they are not trainers, not cross compatable and are not AR lower standard

Good information👍

Great video, I am working on a conversion and want to solve the magazine issue. Where did you find the mag-well dip?

What about Tippman mags?

The adapter clip that you put on the housing on the lower to make the Magazine a little tighter. Are you able to use that also with the CMG magazines?

Been having feeding issues on my S&W AR 15-22 pistol since I bought it last February. It's the mags I have watched many vids on loading but still feed problems

Good explanation. I'm building an upper too. Beyer barrel, RTB bolt, Aero upper. I hesitate to use the mag well boonie packer device since 1) you have to file it to make it fit, 2) this is a big one, I want to be able to to go back and forth between 22 and 223. I don't want to insert/pull out the Boonie Packer too many times due to possible wear since it is metal and I want to preserve my lower. Is that clip you used plastic? The piece you added to the catch, the is Catch 22v2, right? Any concern with it wearing at the lower?

So you don’t need the better mag adapter to use the smith and wesson mags with the cmmg conversion kit? Just the plastic magwell clip?

2x

Would You please tell us where we can get the clips that go in mag well for M&P mags?? I would appreciate it. Thanks in advance. Best Regards

can u use all these on the s&w m&p 15 22 sport

S&W 15-22 magazines are the best with a BETTER-MAG S&W® .22 RIMFIRE MAGAZINE ADAPTOR zero issues

Great video. I’m sorry, where can I find the clips?

Are you running a standard ar15 bolt catch? Or one specific for 22

Are there any aftermarket mags that fit and work with the H&K 416-22lr version?

Do you need that bolt catch adapter for proper lrbho function on 15-22 mags?

My m&p 15-22 mags are on back order and have been for about three weeks now I can’t find them anywhere else

Where can I purchase the add on clip that removes the magazine wobble

I'm looking for a 22 magnum Style is there anything available and a bolt hold open setup

Is the Catch 22 bolt catch necessary along with the mag well clip?

Wait, Will the MP15-22 magazine work with a ciener conversion bolt?

so it really doesn't make a difference between steel and nylon lips

Just use a blackdog 50 round drum...problem solved