Gear Review: ProMag Glock 17/19/26 31-Round Magazine


Pro Mag 31-round magazine courtesy Nick Leghorn

In the recent panic buying spree, one of the things people were snatching up left and right were s0-called “high capacity” magazines. The fear was that these mags would be banned in the near future, and people naturally wanted to stock up. What this meant, especially for Glock handguns, was that there were no longer any factory magazines to be had. Enter the aftermarket magazine manufacturers, looking to capitalize on the demand. But are they any good? . . .

ProMag makes aftermarket magazines for just about every firearm out there, from the Sig P226 to the Glock 19. In some cases, their magazines are indistinguishable, or actually better than the factory magazines. But in this case, there are some noticeable differences.

P1260827

On the outside, and in the packaging, the magazine looks like just any other Glock magazine. But on the inside, where it counts, there are some issues. Original Glock mags have a metal insert that keeps them from breaking or bursting. Only the outside is plastic. The ProMag magazine, on the other hand, is 100% plastic. And not the nice, sturdy plastic that Glock uses. Instead, they went with something that’s just south of Lego standards.

P1260846

That lack of quality shows through, especially around the feed lips. Where Glock magazines would have been clean and precise, the ProMag lips have residual flaps where the two halves of the injection molding machine came together. Not only are these flaps annoying visually, they could potentially lead to an issue with feeding ammo into the gun.

So, the magazine is cheaply made and feels like it contains less plastic than a Barbie doll. The real test, though, is how it works.

P1260845

Well, you can actually load all 31 rounds into the magazine without excessive force. Which is already a step up over the Korean PW Arms Glock magazines, which I was unable to load to capacity. That’s an interesting quirk, though: these magazines are clearly marked on the packaging as “32 round” magazines, but the mag itself is only labeled for 31 (and holds exactly 31). False advertising? Or perhaps someone just mixed up in the labeling department.

P1260849

Once the magazine is in the gun, though, you won’t notice a difference. It works exactly as advertised, and I couldn’t get it to malfunction.

In the end, this isn’t something that I would trust my life to. This is a range toy that keeps me from having to reload so often. And on that level, it works great. But if you’re looking for something to stick in your bug-out bag, you’ll want to wait until the legitimate Glock magazines are back in stock.

Specifications: ProMag 31 Round Glock Magazine

MSRP: $30

Ratings (out of five stars)

Overall Rating * * *
It’s cheap, in all senses of the word. But it works.

avatar

About Nick Leghorn

Nick Leghorn is a gun nerd living and working in San Antonio, Texas. In his free time, he's a competition shooter (USPSA, 3-gun and NRA High Power), aspiring pilot, and enjoys mixing statistics and science with firearms. Now on sale: Getting Started with Firearms by yours truly!

20 Responses to Gear Review: ProMag Glock 17/19/26 31-Round Magazine

  1. avatarBrian Patterson says:

    I’ve never regretted the extra $10-20 for a factory g18 mag………

    • avatarSeanC says:

      ProMags are perfect for the range, they make great FTF training mags. Mix one of those in with your regular mags for a “surprise” FTF drill. ProMag is synonymous with crap. How they survive as a company is beyond belief. They manage to put out a crappy, unreliable magazine for just about every firearm available with the same lack of quality and functionality. Pre-internet days, I got bit twice by them for 2 different guns and will never give them my money again.

      “or actually better than the factory magazines” –> What brand? I’m sure we’re all curious. Hi-Point? All kidding aside, I think I’d trust Hi-Point over ProMag.

      • avatarJusgart says:

        I could not agree more about ProMag being crap, I bought two for my XD subcompact, the only thing that was worse than the magazine is trying to get customer service to replace a broken unit. Considered it a loss and replaced it with a smaller capacity magazine from Springfield Arms and am a happy shooter.
        Customer service is even crappier than the junk they sell.

  2. avatarIn Memphis says:

    I think for now Ill stick to the unfortunate $28 for a G23 factory mag.

  3. avatarMatt in FL says:

    Back when my SIG P238 was a recent purchase, I was looking to pick up a few extra magazines for it. Factory mags are pretty obnoxiously priced when compared to the mags for my XD(M), especially when you factor in that they hold >50% fewer rounds. The name ProMag kept popping up, and at 50-60% of the price of a factory mag, they looked hard to beat. However, before I pulled the trigger, I did some research, and it turns out that the reviews are almost universally bad. Even the “good” reviews are curiously ambivalent, like “for what you pay, they’re not bad” and the like. I decided to go with factory even though it cost me more, because I don’t have money to waste on “just maybe good enough.”

  4. avatarST says:

    Stay far away from ProMag. One of their mags turned my S&W AR into a single shot rifle.

    Buy them for malfunction practice and if by a statistical miracle you get a functional one,put it to work as a competition mag.If you’re using a ProMag in your gun,it better be because you fired the rounds loaded in the factory mag.

    • avatarJMS says:

      Same story for the 31-round mag for my CZ. With the ProMag follower. Swap it out for a factory CZ follower and it works reliably. I have heard this from other people as well who have issues with some of the metal ProMag magazines. Factory follower and 100% reliability. …so… give it a shot. Usually you can get a new, factory follower for under $4

  5. avatarC says:

    the 31rnd-ers are just toys regardless of manufacture.

    • avatarPwrserge says:

      +1 they defeat the point of a pistol platform. I will mock anybody who puts an SMG stick mag into a pistol for any reason. At that point, you might as well trade up to a rifle. At least the ergonomics will be better.

      • avatarC says:

        actually, i kinda like the change in balance on the G17, but i’m not going to carry it around with me. And let us not forget glock fed carbines.

  6. avatarakira says:

    I dunno… I can see how a 30+ rounder could be useful. What if your home defense gun was a semi auto 9mm? Wouldn’t it be nice to have 30 instead of 16 or 17?

  7. avatarRKBA says:

    All my Glock 18 magazines are Glock made, and I paid less than they want for the Pro-Mag for each of them.

    Almost always, the cheapest item you buy will be what fails first.

  8. avatarDyspeptic says:

    A few years ago I purchased some ProMag 10 round metal mags for my 6.8spc Ruger Ranch rifle because the fools at Ruger never bothered to make anything more than 5 rounders. Even though close inspection showed them to be well made and very similar to the factory 5 round mags, none of them worked reliably. I’m still optimistic I can make them work with a little redneck engineering but for $30 a piece it’s annoying. And I still have a bad attitude about Ruger for never offering more than 5 round mags for my now discontinued rifle. Very lame.

  9. avatar"lee n. field" says:

    In some cases, their magazines are indistinguishable, or actually better than the factory magazines.

    Ummm, which ones?

    My only good experience with Promag is with Mini-14 mags.

    If you gotta go cheap, get KCI and replace the springs.

  10. avatarDBPolice says:

    Dont Glock 33 rounders have a +2 floorplate? This one seems to lack that. I got a really craptacular looking Korean happy stick which does have metal inside like a factory mag and the +2 floorplate. Despite it’s horrid looks the mag works well and seems durable. If this one doesn’t even have metal I wouldn’t touch it.

    • avatarSeanC says:

      I was pleasantly surprised by the KCI G19 standard capacity mags. The only functional difference between them and factory is I had to sand down the sides so they would drop free when empty like the newer factory mags. Unfortunately, my 33 rounder isn’t functionally reliable.

  11. avatarChris Dumm says:

    Pro-Mag 5.56mm AK magazines are worthless crap. My Arsenal never had a failure through nearly 2K rounds until I took a chance on a Pro-Mag. The second round fired from *every single magazine* dives into the bullet lifter and gets telescoped deep into the cartridge case.

    This didn’t bug me as badly (as a range toy) when 5.56 didn’t cost nearly $1 a round. Like the other guy suggested, these are useful training tools because try give you lots of FTFs to clear.

    Otherwise, NOT RECOMMENDED.

    • avatarJeff says:

      I have a couple of those mags for my converted Saiga .223, and oddly enough they work pretty well. Never have had a failure with them. They wobble a little, but I’ve flexed them out by hand when firing, and it doesn’t affect function.

      I did break one intentionally when trying to see how much crap it would take – I placed the floorplate of the mag on the ground, and cranked downwards and to the side with the rifle. After doing this a few times, the front latch stretched and deformed. The mag still worked fine, but it broke off when inserting into the rifle some time later.

      When you can find them for $10/ea, they’re an OK investment for some beater 5.56 AK range mags.

      For the SLR-106 and Saiga .223, surplus Polish Beryl mags are a better deal.

      Also keep in mind that there have been several revisions made to the bullet guide of the SLR-106. Since that’s the only 5.56 AK sold by Arsenal, I assume that’s what you have.

  12. avatarJames1000 says:

    Good review Nick. I have never used, because I have never hear ANYTHING good about Pro Mag. I did pick up Korean Glock 17 mag at a gunshow during a what the hell $20 moment. Spot on with it being impossible to load to capacity, even with a Glock reloading tool. Though, no problems firing. I use it for IDPA but nothing more.

  13. avatarLars says:

    If you shoot a .40 glock there is nothing better than the factory 22 round mags. Doesn’t leave the magwell and is GLOCK made.

Leave a Reply

Please use your real name instead of you company name or keyword spam.