Shield Arms is mostly a company that I know for making magazines for the slimline Glocks. I’ve been using the those mags since 2022, and have had great success with them. Well, Shield Arms went into a direction that I didn’t expect, and released an FCU-Glock at the show. What’s even more unexpected is that I actually like it.
The Shield Arms S15 Modular Pistol System
Diving right into the FCU itself, it’s a “partless” design. I say this, as it is basically just a chassis, but lacking a lot of the actual guts of the gun. Aside from the slide rails, locking block, serial number plate, and some reinforcements for the ejector housing and frame, it’s just a piece of metal. With this, you can just pack the FCU full of OEM Glock parts, and have that.
I’ve not been a fan of most FCU guns. Ones like the SIG P320 and Ruger LCP are both nightmares to tinker on, and have glaring issues. On the SIG, the ejector is a permanent fixture on the FCU, so if it breaks, you have to send it back to SIG to be fixed. The LCPs have such a thin frame, which means that it is easy to crack them when pulling the FCU out to work on it.
The Modular Pistol System (MPS) is really simple, and I like that. It’ll work with standard Glock barrels (important for the locking surfaces), and all of the other OEM Glock parts.
Shield Arms will be selling complete guns, with a few versions. There are polymer and aluminum frame models, with a 48, 43x, and the Shield Arms S10 chopped shorty frame size. Price for a complete polymer framed gun should be about $500-$600, and $800-$900 for the aluminum. Shield Arms will be selling the FCUs and frames solo, with prices comparable to similar other FCU al-a-carte guns.
My Thoughts
I’ve never been a fan of the FCU concept. I like the idea of it from the legal perspective, but as the end-user, I’ve always found them worse to work on than a standard frame. Well, that was with the older, worse FCU designs. What Shield Arms has done with the MPS is something that I really, really am looking forward to testing.
The frames themselves are good. I would like to see more aggressive texturing on the polymer ones, but I also understand that these are fairly early models that were brought to the show. Hey, worse comes to wear, I know how to stipple a frame. Being able to buy the FCU and frame a-la-carte is really my favorite part.
I am a fan of taking an OEM Glock, and working it over to make it exactly what I want it to be. I’ve found that the OEM base guns work better than anything aftermarket. Well, I can now take this FCU and frame, and pack it nearly full of OEM parts. I really dig that. Shield Arms should be fully releasing the MPS in Q4 2025, so I’m excited to see how it does. This has a ton of potential, but as we know, potential means nothing if it isn’t actualized.
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