Posted: 4/20/2011 10:39:10 PM EDT
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First off... I think everyone who's read any of my posts knows I love the CMMG .22LR Uppers... They're fantastic, and I now own two. Up until somewhat recently I've used only the "Classic" style of followers for the mags (the green ones). Well, I got some BHO mags to play with...
So far I've only been trying to break-in 2 of the 7 BHO mag's I've got.... Of those two I've been having some trouble getting them up and running 100%. On Mag #1) The follower tends to stick inside the mag... It seemed like it was getting caught on something right out of the gate... I pulled the mag apart to see what the issue was and I found a little notch that I'm guessing the follower has been getting snagged on. Now when shooting, this obviously causes a failure to feed... But if i remove the mag and knock it against something hard, the follower pops back up and I'm good to go. Here are the pictures of the notch inside the mag the follower is getting caught/snagged on:  
On Mag #2) Not really an issue... But something interesting to note... Sometimes it only holds 9 rounds... but if i knock the mag against my hand a couple times the 10th round goes right in. I'm guessing this is because of the rims on the rounds? Anyway, I've never seen it happen with the "classic" green followers. Other than that... The mag is 100%!! Love it! On this second mag... This really is a non-issue for me, but I just wanted to make note of it. I'm hoping that perhaps my comments will lead to improvements in the future. I mean, I've put a lot of rounds down range with my uppers (in excess of 10k copper washed rounds using high temp wheel bearing grease as lube)... I'm kind of surprised that my first issue was magazine related (though, I am re-leaved at the same time)... Anyway... So I was wondering if anyone had see these same things happen? EDIT: Also note that for the break-in that I started by loading 5 rounds ~20 times in each magazine... then moved to 7 rounds ~20 times in each magazine... Then onto 10 rounds in each magazine. I noticed that there is no "Official Recommended Break-In" for these smaller capacity magazines. |
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All of my short CMMG mags have this flaw; some developed it within as few as 500 rounds, others took around 2000.
I didn't contact CMMG regarding this because it is obviously a result of their trying to please the customer by using existing designs. They are a stop-gap measure and were originally designed to run the original follower, and did so very well. Besides most of my shooting is prone or BR, so I only load 5 rounds at a time in these mags and then they run flawlessly. BTW, these mags defy repair by any means so don't bother. I also didn't bother CMMG because they are one of the few companies in this business that take rimfire seriously, and are working on a better mag, so on this they get a pass. You, however, may want to take the matter up with their CS. I'm waiting like everyone else for the new modular mags to arrive, no need to pester or harass CMMG because we'll see them when they are ready - and reliable. Good luck, Ted |
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I don't know if people realize how difficult a challenge it has been to design a magazine for the .22 AR that will work the standard bolt hold open on an AR lower. If one could just design a new lower dedicated to the .22 it would be a much easier task. Problem there is that you would have a lower that would only function with the .22 and not interchange. Next problem is the magazine itself. The basic layout was a compromise made before anyone thought of a BHOA. This basic design of the bolt goes back over twenty years, long before CMMG or most of the current manufactures were even in business.
Like SpecOps I give CMMG a pass on this part. Look around. CMMG is the only company that is taking the .22 AR seriously. They have done more to advance the design of the .22 in this rifle than anyone. Others have played at making uppers but with limited options and no real push to add things like the forward assist and bolt hold open. And, look at all the options CMMG gives us. Not only that, they made these things affordable to the masses. You can spend a LOT more on a .22 upper and get less than what CMMG gives you for a reasonable price. CMMG is still working on this magazine thing. They know the issues and challenges and won't stop until its where it should be. They have some great product in the pipe-line and it will come, it just takes time. I give them five stars for what they have done and what they are working on. |
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Quoted:
I don't know if people realize how difficult a challenge it has been to design a magazine for the .22 AR that will work the standard bolt hold open on an AR lower. If one could just design a new lower dedicated to the .22 it would be a much easier task. Problem there is that you would have a lower that would only function with the .22 and not interchange. Next problem is the magazine itself. The basic layout was a compromise made before anyone thought of a BHOA. This basic design of the bolt goes back over twenty years, long before CMMG or most of the current manufactures were even in business. Like SpecOps I give CMMG a pass on this part. Look around. CMMG is the only company that is taking the .22 AR seriously. They have done more to advance the design of the .22 in this rifle than anyone. Others have played at making uppers but with limited options and no real push to add things like the forward assist and bolt hold open. And, look at all the options CMMG gives us. Not only that, they made these things affordable to the masses. You can spend a LOT more on a .22 upper and get less than what CMMG gives you for a reasonable price. CMMG is still working on this magazine thing. They know the issues and challenges and won't stop until its where it should be. They have some great product in the pipe-line and it will come, it just takes time. I give them five stars for what they have done and what they are working on. DUH? Who said what? |
