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Shadow Systems Foundation MR920 Review: Best Glock Clone?

The Foundation Series from Shadow Systems has hit the Glock clone arena, but do these 9mm clones and their budget price tag hit the mark? We find out.

    Over the years, there have been a few companies that have come out with their own version of the Glock.

    Shadow Systems has made a name for itself in this market with its reimagined and heavily upgraded Combat and Elite series.

    Shadow Systems Foundation Series trio canned

    While these versions took the platform to its highest heights, the accompanying price tag may have left a few shoppers breathless.

    Recently, Shadow Systems released the Foundation Series to give thrifty shooters some options.

    Shadow Systems Foundation Series dream

    We can agree a more reasonable price point makes a product more attractive, but do we also have to sacrifice features to achieve this lofty goal? With a whole set of Foundation Series Pistols, we headed out to the range.

    So follow along as we talk about the features, specs, pros, and cons of the new Foundation Series.

    Table of Contents


    Foundation Series Pros & Cons


    • Upgraded Features
    • Lower price
    • Good performance


    • Occasional QC issues

    The Bottom Line

    The Foundation Series from Shadow Systems cuts back some of the more premium features of their other offerings and makes them more affordable without sacrificing performance.

    at GrabAGun

    Prices accurate at time of writing

    Prices accurate at time of writing

    Available Coupons

    Foundation Series Specs & Features


    • Slide serrations
    • Metal sights
    • Optics capable


    ActionSemi-auto striker firedSemi-auto striker firedSemi-auto striker fired
    Length7 3/4″7 1/8″7 3/8″
    Barrel Length4.5″4″4″
    Height5 1/4″4 3/4″5 1/4″
    Weight22.4 oz.22.04 oz.22.4 oz.
    Comes withCardboard box, manual, optics hardwareCardboard box, manual, optics hardwareCardboard box, manual, optics hardware
    Source: Shadow Systems

    Foundation Series Background

    The Foundation Series is new, so there aren’t previous versions to compare it with.

    That said, Shadow Systems sells the Combat and Elite series, each with more features and a higher price point respectively.

    Shadow Systems DR920
    Shadow Systems DR920…yep, we got a review of this one too.

    With the Elite Series ranging around $1,000 and the Combat Series coming in at around $800, it makes sense for Shadow Systems to create something for folks who can’t wrap their head around paying that much for a Glock clone.

    This was the reason the Foundation Series was created…

    Who Is It For?

    As noted above, the Foundation Series is for people who want to enjoy an improved Glock-style pistol without spending close to a grand to do it.

    Shadow Systems accomplished this by leaving out a few things that weren’t crucial to overall performance.

    Shadow Systems Foundation Series DR right

    Anyone in the market for a good pistol would appreciate the Foundation Series.

    Whether they are employed for home defense or concealed carry, these pistols are reliable (with one noted exception), accurate, and run really well.

    Fit & Feel

    While the Foundation Series is still essentially upgraded Glocks, they feel a little different in the hand. We tested all three models: the DR920 (similar to a G17), MR920 (similar to a G19), and XR920 (similar to a G19X).

    The grip texture is more aggressive, with a solid medium grit. The general shape and angle are very similar to a standard Glock.

    Shadow Systems Foundation Series magwell

    There is no extra magwell at the bottom of the grip, though there are nicely cut angles on the interior that aid with guiding magazines home.

    Each gun came with two Magpul Glock magazines.

    In addition, the undercut near the trigger guard allows a slightly higher grip, and I didn’t have the exposed feeling the web of my hand gets with a stock Glock. The generous beavertail covers this exceedingly well.

    Shadow Systems Foundation Series beavertail

    Another upgrade I really appreciated was found forward of the takedown pins on the frame.

    On both sides, Shadow Systems installed a textured portion for indexing your trigger finger or providing a little extra support for your thumb.

    Closing out the frame, there is even a textured portion on the front of the trigger guard that might assist with braced shooting. Finally, there is also an accessory rail on the front.

    Shadow Systems Foundation Series shoot side

    The slide features angled serrations — front and rear — that assist greatly with racking or simple press-checking.

    In addition, metal sights are mounted, with a serrated black in the rear and a single, white-dot front post on the muzzle.

    The trigger is much improved over the standard Glock, in my opinion. First, the shoe is wider and has a gentle curve that borders on flat.

    Shadow Systems Foundation Series flat trigger

    Even the trigger safety is improved because it sits flush with the shoe face when depressed. Pulling back, the trigger reaches a defined wall, then travels a slight bit further before a fairly crisp breaking.

    On the Lyman Digital Gauge, the trigger averaged 4 pounds and 10 ounces.

    Reset was audible and tactile. The trigger is a good example of what can be accomplished with a striker-fired pistol.

    How Does It Shoot?

    The combination of the nicely done metal sights and excellent trigger makes these guns accurate.

    Although I mounted two Classic Series red dots from Primary Arms, I kept the DR920 stock and focused on the irons.

    Shadow Systems Foundation Series trio standing

    Shooting five shots with each gun from seven yards, I was able to achieve a 1.24-inch group with the DR920, a 1.19-inch group with the MR920, and a 1.48-inch group with the XR920.

    The trigger is easy to learn and provides predictable performance you can repeat.

    Improved ergonomics and increased grip texture allowed me to speed up shots because I was able to establish sight picture a bit more quickly. With the two guns using red dots, I could ride the dot through recoil.

    Shadow Systems Foundation Series MR right

    The Magpul magazines fed nicely, and both inserted and dropped easily when called upon to do so. Malfunctions are something I watch keenly for and try to diagnose whenever we’re testing firearms.

    When we first went to the range with all three guns, the DR920 and MR920 ran like champs.

    However, the XR920 would not feed. I tried multiple magazines, even varied ammunition, and I could not get a round to seat in the chamber.

    Shadow Systems Foundation Series fail

    In my mind, the slide was somehow out of spec, possibly the feed ramp, but I couldn’t be certain. I contacted Shadow Systems, and they sent me a replacement slide for the XR920.

    After we mounted the new slide, there were zero malfunctions with the XR. Over the course of a couple of outings and several hundred rounds through all three guns, there were zero malfunctions.

    9mm Ammo in Stock

    Cost Per Round
    Free shipping
    Free shipping

    What Sets it Apart?

    There are a number of Glock clones out there, but Shadow Systems has done a great job of improving on the original by improving a number of key interfaces. First, the ergonomics are improved.

    Shadow Systems Foundation Series DR recoil

    There are many improvements on the frame in general that fall under this category, but the slide serrations also help with manipulations too.

    Finally, the trigger is much improved and a welcome addition to the Foundation Series.

    By The Numbers



    The trigger and ergonomics come together nicely allowing shooters to make accurate shots.



    This score simply reflects the first version of the XR we received. Once we replaced the slide there were zero malfunctions and notably, the DR and MR never had any malfunctions over the course of a few hundred rounds each.



    Being at its base a Glock, the whole aftermarket world is open to the Foundation Series.



    Given the base design is still largely Glock, the ergonomics are much improved on the Foundation Series.



    The price for these seems to be locked in a $679 over a few online retailers I reviewed.



    Final Verdict

    I had never tried any Shadow Systems guns before this review and, frankly, haven’t spent a lot of time with Glock clones. I totally see the appeal now.

    Shadow Systems Foundation Series XR glamour

    If you imagine what Glock has accomplished and don’t get hung up on stopping at “perfection,” you enable yourself to seek out and implement improvements.

    Shadow Systems has done that without sacrificing key features that affect performance.

    at GrabAGun

    Prices accurate at time of writing

    Prices accurate at time of writing

    Available Coupons

    To my way of thinking, these firearms outperform Glocks in many ways. The only comparison left in my mind is long-time durability, and that is going to take some time to test!

    Are you considering the Foundation Series? Let us know in the comments below! Need more clones? Head to the 8 Best Custom Glock Clones for more recommendations.

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    10 Leave a Reply

    • Commenter Avatar

      Maybe I'm missing something but I would you drop $700 on a clone when you can get a great Sig at that price (and even cheaper).

      June 3, 2023 11:28 am
    • Commenter Avatar

      Hmmmm... sounds like they need to work on QC more for this model.

      June 2, 2023 11:50 am
    • Commenter Avatar

      I’m really not sure what all the fuss is about when it comes to the shadow system line. I have the MR920 and I carry it every day. I really like my shadow a lot. No pun intended, but for
      the price it’s somewhat overkill. Nothing special
      about the trigger. It doesn’t have a threaded barrel for a price point of 750.00. The plus side is that it does have interchangeable back straps and it is optics ready. That’s not really saying a lot these days. I know this isn’t the pistol you reviewed, but I’m sure it’s really close. Anyway, my point is that you can put together a pistol just as nice for under 300.00
      Polymer 80 and a palmetto slide assembly. I’ve done it and the trigger is actually better.

      June 1, 2023 7:44 pm
      • Commenter Avatar
        Sean Curtis

        Paul, I liked them and I'm sure they're pretty similar like you said. Your idea of building something better sounds intriguing, would make for a great video if it weren't against the rules.

        June 2, 2023 9:31 am
    • Commenter Avatar
      Bill Geiger

      You can buy a new Gen 4 Glock 19 at Bass Pro TODAY for $499 (clearance). Palmetto State Armory has them (Gen 5)for $539, every day, retail. With Glock Blue label pricing, it (Gen 5) is available for $398.40 (your article suggests "close to a grand"). So I wonder why a buyer would go for one of these Shadow Systems offerings, when they are more expensive at $662(despite the article suggesting they were "budget minded" ) and at best similar? Good article, and appears to be a decent gun, but why? I have come to expect more accurate comparisons, at least price comparison wise, from Pew Pew!

      June 1, 2023 6:18 pm
      • Commenter Avatar
        Sean Curtis

        Thanks Bill,

        Not everyone can buy Blue Label, but I take your point. This gun is upgraded when compared to a stock Glock. Some folks run stock Glocks, but the burgeoning aftermarket suggests many do not. The Shadow Systems guns offer upgraded features by comparison--even the Foundation Series--trigger, ergonomics, slide milling and more. A straight up comparison wouldn't be accurate.

        June 1, 2023 6:25 pm
    • Commenter Avatar
      Russell Everett

      I've had great experience with Shadow Systems. Have not tried the Foundation series, but I've had their MR920 for almost 3 years and am approaching 12,000 rounds through it with all types of ammo and have never had a malfunction. I recently picked up their CR920 for another carry option and have seen the same quality through about 500 rounds in just a few weeks.

      June 1, 2023 5:39 pm
      • Commenter Avatar
        Sean Curtis

        Russell, I was really impressed with these. Besides the obvious problem at the beginning, they were a cut above Glocks which I've used for years.

        June 1, 2023 6:13 pm
    • Commenter Avatar

      It says Mr. Curtis is an author. What book(s) did he write?

      June 1, 2023 5:28 pm
      • Commenter Avatar
        Sean Curtis

        author noun
        a writer of a book, article, or report.
        "he is the author of several books on the subject"

        June 1, 2023 6:14 pm
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