RZE Unimag Multi-Caliber Magazine - 5.56 NATO / 7.62x39mm / 6.5 Grendel / 5.45x39 / 6.8 SPC / .458 SOCOM - Gen 2
Capacities with various calibers listed below
- .223 Rem / 5.56 NATO / .300 BLK / .204 Ruger / (All .223 Parent Case) - 30 Rounds
- 5.45x39 - 29 Rounds
- 6.8 SPC - 26 Rounds
- 7.62x39 - 25 Rounds
- 6.5 Grendel - 24 Rounds
- .458 SOCOM - 12 Rounds
The new Unimag from Ross & Zheng Enterprises is the only magazine you'll ever need for every STANAG compatible rifle you own! This unique magazine utilizes an ingenious two-piece self-leveling follower design that allows for reliable feeding of a variety of calibers from the common .223 Remington, 5.56 NATO, and .300 BLK, to the notoriously fickle 7.62x39mm and 5.45x39mm variants.
In development for over two years, this magazine has been extensively live fire tested on both full and semi-auto rifles. A stunning variety of rifle brands, and every type of rifle that accepts a STANAG type magazine, were tested with more than 30,000 rounds of 5.56, 7.62x39, 6.5 Grendel, 6.8 SPC, and more. From new bullpups like the IMI Tavor and Kel-Tec RDB, to home-built, budget parts kit 7.62x39 AR-15s, no stone was left unturned. Unimag even feeds 12 rounds of the mighty .458 SOCOM! When the design was perfected and the magazine deemed ready for production, RZE refused to cut corners. The patented stainless steel body has been finished with salt bath nitride, just like a match grade rifle barrel. The stainless steel spring pushes a patented articulated anti-tilt follower that is one of a kind. The magazine is capable of accepting and feeding rounds with an overall length all the way up to 2.31"!
This magazine is perfect for machine gun rental ranges, hunters who bring multiple AR uppers with them in different calibers, and preppers who want to simplify their supply chain and maximize flexibility. If you like the advantages of unusual calibers like 6.8 SPC and 6.5 Grendel but hate the additional cost of outfitting your rifles, buy this one magazine and leave the world of finicky, proprietary mags behind forever! To prove their worth, if you aren’t satisfied with the performance of your Unimag, RZE offers a 30-day money-back guarantee!
Ratings & Reviews
Model # AFB-15 is Faulty
by JD -
Unimag model # AFB-14 & AFB-16 work great. Returned two AFB-15 mags. Great customer service from PA!
A non-goofy looking alternative to 7.62x39 AR mags.
by Chris -
I bought these magazines to use in my 7.62x39 AR build. I’ve personally always hated the look of ACS mags in x39 build AR’s, I’m not a fan of the banana or sharp curve to them, so I was pretty excited to come across these. So far I’ve had really good luck with them feeding well, my rifle has run flawlessly from these. I will agree with other reviews, it does feel a bit weird when loading the 7.62 rounds in but I always make sure they’re seated to the rear. I have noticed one of the two that I own fits a lot more snuggly (if not borderline tight) in the magazine well, but that’s not much of an issue to me. I definitely plan on buying a few more, probably all exclusive for my AR47 build, I would recommend them. I’d also like to think some of the folks whom had bad experiences with these just got a faulty mag out of the bunch, for a magazine that does multiple calibers all out of one platform I’d say it works better than I expected.
Love, love, love
by George -
I have 5 of these magazines and love them. I purchased them for my 7.62x39 AR and they work flawlessly. Not really worried about not being able to load the advertised amount of ammo. I have yet to use them in my other AR’s. I use my regular AR 15 mags for my 5.56/.223’s, and 300 BLK. This mag has me thinking about building other AR calibers.
<br>Wish I could give them 6 stars....
A little odd but works fine.
by Mark from Orlando -
Got this for my AR47 build. Worked fine. Had a few minor issues running 762x39, but I may have put too many rounds in the mag. It recommends no more than 25 762's. It's a little odd to load, but once you get it cycling, it runs fine.
by Rob -
Picked up one to try out with 7.62x39, 6.5 Grendel and .458 Socom.
<br>Not having any luck at all with the magazine. First 4-5 rounds of both 6.5 Grendel and 7.62x39 will jam part way into the chamber on every full mag. The next 6-8 rounds will run fine, the last 10 or so rounds will actually start falling (popping?) out of the magazine (sometimes 3+ rounds pop out in the chamber).
<br>Never bothered with .458 Socom as the round is simply too costly to waste fiddling around with a magazine.
<br>Tried in two different x39 builds, and two 6.5G builds. Two different x39 rounds, and 3 different 6.5G rounds. No dice.
<br>I had high hopes, but this seriously crushed them, the squirted lemon on it just to be spiteful.
<br>Maybe this is a far-sigma sample, but I'd like a refund or replacement, please.
Works great in my ARs
by Jim -
Bought 4 of these use for 7.62x39, 6.8spc and 5.56 work great! Could never find a reliable mag for my 6.8 except these. Makes it easy to go to the range with different caliber ARs one set mags not 3 or 4 separate. Looking forward to building a 224 Valkyrie these should work for that too being based on the 6.8 doc case.
A Big Disappointment.
by Jerry -
Does not hold the number of cartridges listed on the packaging. Very difficult to charge with cartridges. Abig disappointment. I will not buy again or recommend.
Buying more already.
by Randall -
Bought 3, all three fed 200 rounds of 7.62x39, not a hiccup. then ran two full mags of 5.45 through each, again not an issue. Funny enough it seemed tough to load them with 5.56. I will be buying more.
Great so far, will buy more
I ordered two of these mags to try out with a recently purchased pws mk111 7.62x39 upper. I really don't like the banana mag loom so I was hoping these would work out. Both mags have been great so far. They load fairly easy and have fed perfectly. I only have about 150 combined rounds through them, but the functioned flawlessly. I also tried a few 5.56 and those fed perfect too. The finish isn't amazing but it is after all a metal mag so that is to be expected. I'm gonna get a few more. Would recommend based on my experience thus far.
WORKS! Nuff Said
by Billy Danz -
Stupid Primary Arms site won't allow me over 1,000 characters to write my detailed review, so I'll just chop it down to this:
<br>Went to the range today 12/7 and the mags worked great!...no issues. With each mag, I did 2 fully loaded mags with normal rates of fire and 2 fully loaded mag dumps with extreme rapid fire using a Fostech Echo trigger (google/youtube this trigger if you've never heard of it) and there were zero FTF's/FTE's!! The Unimag, with it's unique follower design, I believe has solved the feed issue. I figured I had nothing to lose as I would just send them back if they were junk. They work! If it works on the extreme tapered case of x39, it should work for the other listed calibers.
WAY too tight!
by Gary -
My magazine was so tight that I had to use a hammer to knock it out of the mag well. I contacted Primary Arms and they said this is normal and mine is the Gen 2 that is better and it will loosen up. I was worried it would be stuck in my mag well. Haven't had problems with any other magazine. Don't buy it, save your money.
Great choice for multiple AR calibers
by Matthew -
So far I've used this for 5.56, .300 BLK, 7.62x39, 6.5 Grendel, and 6.8 SPC without issues. Unfortunately, it had trouble with .50 Beowulf, but I'm getting more! We're not used to paying $40 for a mag these days, but it doesn't have to take the place of more than three or four single-caliber magazines before it becomes a bargain – and you don't have to take up room with all the different ones or take a chance on bringing the wrong mag to the range (done that!).
Unimags are now good to go
by Bret -
I bought one Unimag from Primary Arms to use in my 7.62x39 Windham AR15. It inserted in the magazine well just fine, was 100% reliable and would drop free. So, I ordered four more. They would insert in the magazine well with a good amount of resistance and wouldn't drop free. I called Primary Arms and they sent me a return shipping label. I returned them and promptly received a credit. Great service Primary Arms.
<br>A few months later I was looking at Primary Arms' website and noticed that they have new 2nd generation Unimags available. The description indicated that they solved the very problem I experienced with the four that I received in my second order. I took a chance and ordered four more. They all insert in my Windham, run 100% and drop free. I tried them in other lowers too and they insert & drop free without issue. I then ordered nine more. They all also insert and drop free just fine. The bottom line is that these are good to go now.
Defective Product, Good Service
by Trevor -
This product is a great idea, but I don't suggest that you order it here. Primary Arms shipped my order of this mag and a few other purchases quickly and affordably (as usual, PA is great), so no complaints there, but the magazine had a factory defect that made it entirely unusable. After talking with RZE, the company behind the unimag, they informed me that early batches of the magazines often have this same defect and that they would be happy to replace my defective mag with a new and functional one at no cost. Judging from the number of negative reviews here on PA, their stock of the product must be from one of the defective batches. Long story short, good product and good customer service, but you may want to order the mag directly from RZE instead of primary arms, unless you're willing to contact RZE and arrange for them to swap your defective mag for a newer, functioning one.
Little hiccup, then strong finish!!
I was able to use one of the prototypes over a year ago and it worked as described. The first few I ordered were so tight they weren't usable. After sending an email, I was contacted and told they were aware of the issue and working on a solution. I had replacement magazines within a couple months along with an extra for my trouble. They work flawlessly with my .223, 7.62, 5.54, .300BO and my 6.5 Grendel. Great job!!
5.56, .300 Blackout, and 7.62x39 are a go!
by Mike -
Just tested the RZE mag with great results! I shot .223, 5.56, 7.62x39, and .300 Blk from 3 different rifles. I had 1 hang up with a Magtech .300 getting caught up on the star chamber, that was resolved by ejecting and reseating the mag and round in question. I fired about 40 more rounds after that with the same rig w/o issue.
<br>Big suprise was the 7.62x39 reliability. 100% go, no issues!
<br>It felt weird loading 5.56 and 7.62x39 into the same mag, but it works. The 7.62 seems to seat in the mag a bit pidgeon-toed in order to make it feed right, but it does!
Issue resolved through manufacturer.
by J VanHorn
I had an issue with these mags being too wide for any standard AR lower receiver. They cycle great with 5.45x39 and 7.62x39, but they fit so tight, I had to use a lot of force to pull them out. They fit better in my 6.8, which has a billet receiver, and they cycle great with that too, but won't drop free.
<br>I contacted the manufacturer and found out that some of the first production run of these mags had this issue. They have corrected the issue and they are replacing the magazines for me +1 for my inconvenience. I'm giving the 5 stars for customer service, and the mags do cycle great.
Barely earned the 2nd star.
by James -
Two star saved by second unit which is only "VERY" tight. My first unit is so tight that it won't fit in any of my, many, AR15's, so it's useless. The second unit is only very tight and works as advertised. It's sad that these things are wider than mil-spec, that's a pretty obviously glaring error and one the manufacturer certainly must know. It's also odd that my two units are different thicknesses which says that the manufacturing process isn't consistent. Thus two stars.
Should be zero stars for this product.
by Kyle -
Had to give it one star....should be zero....looks good on paper, the idea is great but the function lacks....tried it on 4 different lowers could get the magazine in two of them with great difficulty, and had to use two hands and my knees to get them out. Total waste of good money....wished they worked but useless as they are.
Good option for multi calibers.
I had demo version that worked fantastically. I eventually purchased several of their first production version and had issues ranging from good fit to very tight fit on various lowers. I contacted the company with my issues. They've recent modified their manufactureing and magazine dimensions and in fact replaced the ones I had first purchased. The new ones fit perfectly and drop freely in each of my 8 lowers and have functioned fine thusfar with 7.62x39, 556 and 300 BLK.
Bought as a x39 mag
Tested using a suppressed 5.56 and 7.62x39 ARs. First i noticed they are a very tight fit into each of my lowers. and each one will not drop free when magazine release is pushed. personally not a big deal for me. Loaded one magazine with Tula 75g Hollow points and it did not want to chamber a round with every so often the round would get pushed deep into the cartridge. This im not sure if it was the gun or the magazine. So loaded another Magazine with both Tula and Wolf steel case 7.62x39. The Tula was 154grain soft points while the Wolf was 123grain FMJ. Had no problems each magazine shot. i will likely test more FMJ 223/5.56 and 7.62x39 but so far im impressed with how well it works with the 7.62.
Works fine in the .450 Bushmaster
too!Well we seem to have a new functioning alternative mag for the 450b! Ran it through my Remmy R-15 with the Max-1 camo dip. Tight fit in the mag well but not excessively so...I think the drag on the mag was due to the camo dip overlap up into the mag well on my particular rifle. If I cleaned the paint out of there I think the drag on the mag (hey that rhymes!) would go way down but I'm pretty sure this mag would still be somewhat snug fitting in the R-15. That's just a minor complaint I have with my particular rifle however.Full and partial mags functioned just fine no observed problems...didn't fire a large number of rounds because everything seemed to work as advertised. Bolt hold-open worked fine.Top round position looked just right for the 450b with the tip slightly "nose up" when held in the mag lips.Manufacturer recommends loading the mag carefully so that the rounds double stack correctly and the top round is centered in the mag lips. Did that and it worked fine. Whooda thunkit?I noticed while initially hand-cycling some rounds out of the mag that the mag lips were scratching the brass so I smoothed them over with a 600-grit sanding stick and some metal polish on a Dremel wheel...problem solved.Finish construction and overall quality seem top-drawer.Summary of my experience with the RZE Unimag: Quality product that works well with the 450 Bushmaster!
7.62 and 5.56 tested
I was lucky enough to be able to test one of these excellent magazines with 5 different 5.56/.223 AR's and 2 separate 7.62x39 AR's. Over 700 rounds and not a single issue. The dedicated 7.62 AR magazines that I currently own are less reliable by far. Great product - Great functionality.
I was part of the select group to have the privilege of initially testing the Unimag once the proto type was complete. The mag was tested in the 6.8 223 and 277 WLV. It functioned great with no problems what so ever. The manufacturer was meticulous with the construction fit and function. I would not hesitate in adding a few mags in the future.
I tested one of these unimags a while back for the developer. It is a fantastic magazine. It works well with a variety of calibers as claimed and the oal that it allows can't be beat. Those of us that handload the 6.8 like to stretch the oal for better accuracy and velocities. The oal can't be beat on this mag. I've tested it with the 6.8 spc 223 and 277 wolverine. It has fed everything 100%. I have not used the grendel/7.62x39 rounds in it but my experience with the calibers I've used has been nothing but positive.