These ProMag magazine bodies and followers are injection molded from strong, lightweight polymer. The springs are precision wound using heat-treated chrome silicon wire. The result is quality, consistency, durability and reliability.
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Durability issues aside, these feed (Quarter Circle 10 lower) better and more consistently than the various metal mags, which invariably need tweaking.
I'm a bi-weekly non-professional shooter and have never had any major issues with these mags - with one exception. As they get older, the feed lips weaken and wont hold many more than 15 rounds. Again, as this is not my profession, I don't really care - 15 is plenty at the range.
Bottom line - If I were anticipating the possibility of a life or death shootout with my 9mm AR, I would carry some finely tweaked metal mags; otherwise, these are just fine and the price is right.
Absolutley the best value and the most affordable mag i could find. Plastic isnt the greatest quality and the lips do bulge when fully loaded,but still does the job right and worth what u pay for. I will order a couple more but i might also just buy the metal mags. Cheapest prices, trust me i looked. Super fast shipping.
Co-worker gave me one new in the wrap to see if I could make it work. Yeah no. Plastic is not stiff enough to use in a mag. Rounds would pop out if I slapped it in if I did not have it fully loaded. Fully loaded it took a lot of effort to force it into the Hahn mag block, which sometimes resulted in a round getting spit out of the mag. If you made it beyond that, It jammed the round into the barrel face above the chamber every time. I slowly ran bolt forward and got a round chambered. Next round jammed and scraped away part of the feed lip on that side. Carefully cut away all the flashing no love. Fixed the lopsided front and back openings so they were symmetrical opens. Still no love. Lowered mag by filing catch slot. Sometimes will chamber, but mag is now unreliably low. Gave up as I had been working on it or longer than it takes to fix two ASC mags. Regulated it to role of less lethal clubbing device.
If you want to save money and are willing to tinker if it does not work 100% then buy ASC as I made them work with a little sandpaper to the top front of the follower. (Haven't tried C-products yet, but would expect the same behavior in my gun. Last two rounds don't like to feed when follower hangs on feed ramp.) They sometimes work 100% in a gun without mods. If you don't like to tinker or gamble that you won't have to then you are left with Metalform. 9mm AR sells other quality mags for reasonable so buy them instead.
Mag didn't seem to feed to start with. just wouldn't push the round into the chamber. Looks kinda rinky-dink - I've seen better looking plastic mags.
but it was new, after removing it and literaly beating on it, back tapping it HARD, it went to feeding. I bought this one primarily just to get the gun running.
20 rounds -- so far.
This magazine is made from a very cheap plastic. The feedlips bow when fully loaded, and it constantly produces feed problems. Complete waste of money
So I saw the reviews of this mag and decided to try it regardless. What I look for when I see reviews is consistency amongst the complaints. Failure to feed. Feed lips breaking off. Whatever. With that being said I decided to give it a shot anyways. When I opened the packaging I could tell immediately that these things weren't going to stand up to the test of rigors if I ever needed them.
I want to start this off by saying that I carry this 9mm AR pistol in my trunk along with a AR500 armor carrier and some extra gear. I'm a police officer and God forbid anything like these mass shootings occur where I am patronizing and I'm in my personal vehicle I want to be able to respond immediately.
That aside, these magazines are flimsy. The feed lip of the magazine buckles under the pressure of having the thing fully loaded with all 32 rounds. It's plastic, and cheap plastic at that. I wish Magpul would put together a 9mm magazine. Whatever polymer they use is much more rigid than these things. It would be better if ProMag coated their metal magazine in a polymer to give it that rugged look and feel.
I noticed an issue as soon as I fed this fully loaded magazine into the Spikes Tactical Magwell block. It was pretty tough to get the magazine seated and to catch the mag release and it was tough to even get into the magwell block. The pressure from the rounds being fully stacked was making the top lip bow out which is why it was so tough to even get the magazine into the magwell. I unloaded the magazine and fed it into the magwell and it worked perfectly fine. No rubbing issues or anything.
I would never trust a magazine like this with my life especially in the potentially tactical sittuations I prepare for. I bought one for the intentions of testing it out and to buy more if they worked out that well. I'm sure the issue would be resolved if I didn't load the magazine full, but thats not how I like to operate. I won't be sending this back because it's a great magazine for the range to just go shooting with, but take my advice and just order some metal magazines. You'll thank me and yourself in the end if you ever need them.
It takes too much effort to for the mag to latch on, and on the top left side of the opening the mag already split as to where the ammo will just pop out
yes i am having trouble with this mag. is does not catch the mag latch with out a LOT of effort. i have a fix for it from online. we will see