Shield Arms S15 – 15 Round Magazine For Glock 43X & 48

Shield Arms S15
Shield Arms S15

U.S.A. –-(Ammoland.com)– When Glock released their model 43x 9mm handgun, it jumped in the middle on an ongoing (and still continuing) arms race to not only make concealed carry guns smaller and lighter, but higher capacity as well.  With its slim profile and short slide, the 43x achieves a smaller size than the massively popular Glock 19.  At 10+1 rounds in the factory mag, it seemed capacity was lacking though.  While Glock hasn’t responded to market desires with a bigger mag, Shield Arms has swooped in and brought us the S15, an aptly named 15-round magazine.

Shield Arms S15 – 15 Round Magazine For Glock 43X & 48

Shield Arms S15
Shield Arms S15

In lieu of a tech spec list, check out this simple infographic provided by Shield.

Shield Arms S15
Shield Arms S15

 

Steel.  There’s the big difference between a Glock mag and a Shield mag.  Glock uses polymer around a steel lining, which eats up precious internal space.  Shield went straight up steel alley and bumped capacity up 50% over OEM, while maintaining flush fit.  Yep, the S15 fits within the 43x magwell!

Shield recommends using an aluminum mag release (to avoid wearing the polymer mag catch to the point of failure),  so I went ahead and got one of those from Shield Arms as well.  Installation takes a minute or two if you know what you’re doing, and five minutes if you have to youtube instructions.  You just need a flathead screwdriver, a small one preferably.

Shield Arms S15
Shield Arms Glock 43x/48 Mag Catch
Shield Arms S15
The aluminum mag catch has great texture

While still at the shop, I ran the Shield Arms S15 mags through some reload drills and noticed they’re a little on the snug side.  They’ll usually drop free, but sometimes that was a bit slow.  Sometimes I needed to shake the gun a bit to give gravity an assist.  Brand new mags in a brand new gun, I’m ok with a small break in period but I’ll need to see this go away.  I numbered the mags using the dot matrix on the bottom, the better to keep track of any possible misfeeds or other issues.

Shield Arms S15
Shield Arms S15

I hit the range and loaded up all three mags with Federal’s American Eagle 115gr FMJ’s.  Loading goes fine until 10 rounds, then the resistance really spiked.  I don’t have soft, sally hands.  I’ve been loading mags since I was a kid, I joined the Army, loaded many more mags.  I’ve been loading them ever since, save for breaks to go commercial fishing back in Alaska, which develops meaty hands as well.  So believe me when I say, my thumbs were wrecked after I loaded the three mags, three times each.  Fear not, they held the advertised 15 rounds!  This is the first time in my life I wished for a mag loading device (like the one Glock includes in each new gun case, and is compatible!).  I’m looking forward to these easing up a little, given time and more use.

Shield Arms S15
FMJ and MHP feed fine from the S15

If mags are really hard to load, that sometimes spells difficulty distributing ammo in the other direction.  A spring that binds, a follower that snags, or a rough internal edge could lead to a stoppage.  Additionally, a spring that’s too stiff could give excess pressure when a full loaded mag is inserted into a handgun that has the slide forward, not allowing the mag to fully engage the magazine catch.  The Shield Arms S15 mags have fed flawlessly through the first couple hundred rounds of their lives.  No stoppages, no double feeds, no problems.  There’s also no problem slamming the fully-topped off mag into the gun when the slide is forward.  The gun likes the mags, and the feelings seem to be mutual.  I may not like loading em, but the S15’s are a blast to kinetically empty.  The S15 ran both American Eagle’s FMJ’s and Norma’s 108gr monolithic hollow point, which is slightly longer overall than the FMJ’s.  This caused problems in another (non-Glock, non S15) used at the same range day, but no troubles here.

Shield Arms S15
That’s a flush enough fit for me, when getting 5 extra rounds.

Shield Arms solved the Glock 43x’s biggest shortcoming before many even knew that weakness was there.  They’ve made a durable, highly functional upgrade over the stock magazine that adds a 50% force multiplier.  This is a Made in the USA product, with a 100% lifetime warranty and a “Spring for Life” guarantee.  So when the $39.99 price tag hits, consider this is a “buy once, cry once” item that is covered for the rest of your life.  They weren’t built cheaply, so don’t expect them to sell cheap.  Buy American and buy quality!  Your life may depend on it.  I’m happy with Shield Arms S15 mags, and think you will be too.

UPDATE: 4/16/2020

After reading a comment, I checked the mags after leaving them loaded for a month.  They are much easier to load now.  The spring has eased up a bit.  Thanks Cea!

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About Rex Nanorum

Jens Hammer

Rex Nanorum is an Alaskan Expatriate living in Oregon with his wife and kids. Growing up on commercial fishing vessels, he found his next adventure with the 2nd Bn, 75th Ranger Regt. After 5 tours to Afghanistan and Iraq, he adventured about the west coast becoming a commercial fisheries and salvage SCUBA diver, rated helicopter pilot instructor (CFII) and personal trainer, before becoming a gear reviewer and writer.”

-Rex Nanorum

@Rexnanorum

 

8 Comments
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Ej harbet
Ej harbet (@ej-harbet)
1 year ago

Shot both the 43x and the 48.would be happy with either but the 48 shoots better for me.ive known of the s15 for some time.for me itd be a s14 because im cautious about my mags. A 48 suitably modified to my taste will soon replace my od 19 build for edc. If i had both guns id turn into the male version of the lady who took 30mins trying to decide between equally liked outfits.

crescue
crescue (@crescue)
1 year ago

I’m not particularly a fan boy of glock, Sig, HK or Smith but I will tell you I’m carrying both my 43x and 48 far more than any other firearm at this point. I love the way my sig shoots but I like the capacity and OEM look of having a G-19 look and capacity in a smaller package. I have had to do some other tweaks like the triggers on OEM glocks are not a favorite. So every Glock I own had a flat trigger. I also add grips from Hogue and trim down the finger grooves. It’s a… Read more »

jrw40113
jrw40113 (@jrw40113)
1 year ago

Bought three and they work great. I was able to get them at a discount since mine were pre-orders.

Me
Me (@xprtmarksman)
1 year ago

I’m glad you had a good experience because mine caused failure to feed twice before I stopped wasting time with them. Bought as a carry mag and I’ll never be able to trust it now.

jrw40113
jrw40113 (@jrw40113)
1 year ago
Reply to  Me

Is your 43X/48 and early model silver slide or a later dark slide. The reason I ask is some of the early models seemed to have issues with the mags and the company came out with an extra power mag spring to overcome the issues. Give them a call and see.

10MM
10MM (@10mm)
1 year ago
Reply to  Me

Seconding what jrw40113 below said: this is a known issue that Shield Arms will take care of for you. If you have an early 43x/48, you need the extra power springs. Something about how Glock made a slight internal change from the start of the models makes them not play well without the extra oomph of the extra power springs.

Cea
Cea (@ceapea)
1 year ago

I bought one to try. It works perfectly. I just received two more. Haven’t tried them yet. But I have them loaded to max, and leave them loaded for a week. It makes them slightly easier to load after that. Three should be perfect.