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Courtesy Joe Grine

Last year GLOCK went small with the GLOCK 42. This year GLOCK turned 180 degrees in the other direction by releasing the largest piece of Perfection to date: the Gen 4 G10 in 10mm.  This hand cannon will undoubtedly be well-received by both GLOCK desciples and hunters alike.  I’m thinking this pistol will be good medicine for whitetails and feral hogs . . .

Jeremy did a video walk-through of this optics ready, 6″ bbl beast with a GLOCK rep:

Courtesy Joe Grine





GLOCK’s two press releases for the Gen 4 G40 and MOS system state:

The New GLOCK G40 Gen4 in MOS Configuration 10mm Pistol 

Introducing the biggest and most powerful GLOCK to date! The G40 Gen4 in the MOS Configuration is chambered in 10mm and combines a full 6-inch barrel for an improved velocity with a magazine capacity of 15 rounds. The 6-inch barrel provides maximum velocity and increased terminal ballistics. 

The G40 Gen4 in MOS configuration is a powerful yet easily carried pistol; perfect for the outdoorsperson, hunter and sport shooter. It is designed to give the handgun hunter the ultimate choice in semi-automatic gaming pistols. The 10mm cartridge is on par with the .41 Magnum and has proven to be more than capable of taking down game such as Whitetail Deer, Russian Boar and even Feral Hogs. 

The 10mm round offers higher velocity for greater penetration. The elongated slide increases accuracy as the site radius is increased to a full 8-inches! It also ensures that the felt recoil is thus reduced. 

The G40 Gen4 is configured in MOS (Modular Optic System), making it one of the most versatile GLOCKs in the line. The MOS is a specialized platform for mounting accessory optics to the slide of the pistol. The MOS gives the shooter the ability to mount the most popular reflex sights available on the market today. Reflex sight advantages include, faster target acquisition and enhanced long-range accuracy. Beginning in January 2015, the configured MOS versions will also be available for the G34 Gen4, the G35 Gen4, and the G41 Gen4.

If you are a 10mm enthusiast, this is the pistol you have been waiting for.

 The New GLOCK MOS (Modular Optic System) Configuration

GLOCK engineers have developed the GLOCK Modular Optic System (MOS) to simplify mounting of popular optical sights without costly custom machining of the pistol’s slide. The GLOCK MOS allows the shooter to mount the sight of their choice, easily and quickly using only a few tools.  The versatility of the system makes changing optics easy.  The shooter is not locked into one optic since switching from one sight to another is as simple as removing the old sight, removing and reinstalling the correct adapter plate, then mounting the new sight. The MOS is offered with five different plate options to comply with the specifications of some of the most trusted optic manufacturers in the industry.

The advantages of optical sights mounted using the MOS are increased speed of target acquisition and target transition for faster times in competition, and improved accuracy at both long and short range. Optical sights are popular in competitive shooting and are becoming increasingly popular for concealed carry, home defense and target shooters.

GLOCK now offers four of the most popular pistols configured in MOS (Modular Optic System). The models that may be ordered in the MOS configuration are the G34 Gen4 (9×19 mm), G35 Gen4 (.40 S&W), G40 Gen4 (.45 ACP), and the new G40 Gen4 (10 mm). Specifications of these models do not vary from their respective Gen4 configurations.

Courtesy Joe Grine


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    • Agreed. I was just thinking, “Wow, a GLOCK I don’t hate.” The more I look at it, the more I think I might want one.

      • Me too! I’ve been thinking about a 10MM for a while now. This just may be the one I buy. A long slide with the slide milled for a mini red dot. Very nice.

    • It’s the Hummer syndrome.
      If Hummers weren’t so big, they would just be ugly cars. It’s their size that appeals to testosterone-driven buyers. Size trumps ugly.

        • …says the small-fry types 😀

          SIZE and ABILITY trumps either aspect alone. 😉 Just Sayin’!

          Got a heckuva deal on my son’s lightly used G20c, $400 (with option to buy back in the future)
          I quickly added the LWD 6.6″ threaded barrel, ss guide rod and 20# spring, per their recommendations.
          Still need the range trip, but it gives me time to get used to the wonky “Glunk trigger” as most of my pistols
          are either single action (1911, Browning Hi-Power) or just different. Dry firing pays off! I can now keep a
          steady aim during trigger actuation. I think it will be OK, but i’d like the G40 slide on there, if it fits!

  1. Why release an optic ready platform with no suppressor height sights to co-witness.

    Both S&W and FN have this down as standard, why is Glock so damn cheap?

    • I was surprised that when asked yesterday, they said they weren’t going to release threaded barrels for these. I guess they are going to leave that to the usual third party providers.

    • Since all other Glocks have full length dustcovers, to make the long slide work on a standard frame (which it is 34 and 17 have the same frames) they had to put that extra bit under the slide to give the recoil spring assembly something to butt up to.

      basically if you were to pull the front end of a full size slide out by 1 ” that’s about what you get with the shape of the barrel. It’s just a lot more obvious on the 6″ variants.

    • I’m guessing they use a standard length guide rod and spring so that machine work is to add lightness to the slide… but that is JUST a guess.

      • I don’t know if the weight of the recoil spring assemblies is the same, but the length of a G17 and G34 assembly is the same and interchangeable.

  2. IMO Glock screwed up; they should have offered these Optics ready models with Trijicon suppressor height sights as an upgrade it just makes sense.

  3. “good medicine for whitetails and feral hogs.”
    And predators. Four-legged and two-legged.

    Now if only Hi-Point would produce a 10mm carbine that takes Glock magazines.
    Hey, a guy can dream, can’t he?

        • “Yeah, yeah, yeah … But it still wouldn’t be a Hi-Point, would it?! Just sayin’ ..”

          That’s a feature, not a bug.

          And don’t forget the Mech-Tech CCU!

    • Not quite what you’re asking for, but you can get a Mech Tech carbine conversion unit for your G20, G21, G40 or G41 which would turn it into a 10mm carbine with 16″ barrel… and, since it’s using your Glock lower, it would inherently use Glock mags…

    • I currently have a Glock 20SF and love it. I use to work for Underwood Ammo before Kevin moved to IL. He is the Nations leading ammo producer for the 10 mm cartridge. Underwood’s 10 mm hardcast ammo in this 6 in barrel would be devastating to all predators, both 4 legged and 2 legged. When Kevin says his ammo will produce a certain fps, you can count on it surpassing that by at least 2 to 3 percent. NEVER under it like the rest do. Wolf barrels makes a 6 inch drop in for the Glock 20 but it looks odd with 2 inch’s sticking out past the end of the slide. I GOT TO GET ME ONE OF THESE .

  4. Most powerful? The G20 is chambered in the same caliber, so that’s not quite true.

    Now they need to figure out a way to put a buffer tube on it, so folks can install an arm brace (wink, wink) to handle the recoil of the mighty 10mm.

    • Agreed. I was an avid g20 fan and ran a steady diet of underwood through three of them. The frame fractured on all three over time…on the plastic area that absorbed the slide recoil. I gave up on flock because of this issue. Flock calls it normal wear…I call it a design flaw. Springfield protects this area with a steel insert and my xds shows no signs of excess stress in that area. As soon as glock follows suit in the gl40, I’ll buy one.

      • Ryan, assuming your three g20 were all gen 3s, what recoil spring were you using? Was it the stock recoil spring or did you upgrade to a heavier spring (21 or 22 lbs)?

    • Guess the old (wannabe) sourdoughs that would have clobbered you over the head for thinking anything less than a .500 mag is no backup bear gun turned away when they saw “glock” in the title.

      This Alaskan agrees with you, sir.

  5. So they are making a 6″ 10mm now, but no love for the gamers with updating the 24 with a gen4 variant and actually producing it?

  6. I might consider picking one up for a hiking/ woods gun. In my neck of the woods all I would come across are cougar, black bear, coyotes and wolves; this would handle that job pretty well.

  7. I really like the concept … a lot! That would be one serious self-defense configuration.

    As for hunting deer or feral hogs with a full-size semi-auto pistol in 10mm and full-power loads with hardcast bullets, I recommend limiting your shots to 20 yards unless you can sit for a couple hours after shooting a critter and recover it a half-mile away without trespassing.

    Glock’s claim that 10mm is on par with .41 Magnum appears to be just plain wrong. Full-power 10mm loads produce nearly identical results to .357 Magnum when using 180 grain bullets and similar barrel lengths … versus .41 Magnum that produces the same or higher velocities with 230 grain bullets.

    • a 180 grain hard cast 357 and 10 mm would go at similar velocities out of similarly framed handguns. Both with cut straight through a deer, but the 10 mm will leave a bigger hole and cause more blood loss. Up to you if you think that is important (or if you need the power to begin with).

      • Almost any firearm bullet — including .357 Magnum and 10mm hardcast lead bullets — are lethal on deer and hogs out to 100 yards or so. The problem is getting a quick kill to prevent mortally wounded animals from running away to die hours or days later and 100s or 1000s of yards away.

        From what I can gather, if you want quick kills on deer and hogs out to 100 yards or so, .41 Magnum is potentially marginal and .44 Magnum is better.

    • Buffalo Bore and Underwood Ammo load nice and hot for the 10mm (and everything else, too). It’s easy for the 10mm to achieve 800 FPE or more from a 6″ barrel. Heck, the .40 Smith can almost accomplish that with 135 grain “+P” (no SAAMI .40 +P designation) ammo.

      I’m not sure what the .41 Mag does with hotloads, but it certainly doesn’t hold 15 rounds.

      • Using Buffalo Bore as an example of 10 mm vs. .41 mag hotloads:

        BB .41 mag 170 gr JHP (1650 fps, 1028 ft. lbs)
        BB 10 mm 180 gr JHP (1350 fps, 728 ft. lbs)

        BB .41 mag 230 gr KSWC (1450 fps, 1074 ft. lbs)
        BB 10 mm 220 gr HC (1200 fps, 703 ft. lbs)

        The extra 7.8 mm in the case helps.

        Doubletap and Underwood also show differences around 200-300 fps and 250-350 ft. lbs for muzzle energy from 10 mm to .41 mag. Love the .41, but the idea of a 6 in, 10 mm semi-auto with fast reloads for field use….

      • I would disagree. For the semi-auto world hand cannons you start looking at Wildeys, Desert Eagles in .44 Mag, .50AE, etc. definitely nothing in 10mm. I think even .44mag is the very lowest limit to qualify as a real hand cannon.

        • Depends on what you consider a hand cannon… my definition would be the power produced by the big revolvers like the .454 Casull or .460 S&W. Those things have massive recoil, and deliver big bullets with velocity and tremendous power — my 6.5″ RJM sends a 240-grain bullet at 1870 fps, for 1863+ ft/lbs of energy. Farago’s .460 S&W didn’t register properly on my chronograph but the recoil was vastly more, many loads claim 2300 ft/lbs. Which I would find believable.

          So, by that metric, no, a 10mm isn’t really a hand cannon. I tested my 10mm G21 (converted to 10mm) on the same day I was testing the .460 S&W, and there was a massive gulf of difference between them.

          It may not qualify as a true “hand cannon”, but it’s among the most powerful of generally-available semi-autos. The 460 Rowland offers a tad more power (and approaches .44 Magnum power levels) but I don’t think we’ll be seeing Glocks coming from the factory chambered in .460 Rowland anytime soon.

          That said, I can’t think of a gun introduced recently that I would want more than this G40 MOS. The 10mm is plenty powerful, it isn’t really on par with a magnum revolver but it still packs quite a wallop, and it’s much more shootable than a magnum revolver is. And that 6″ barrel will extract a little more power (about 100 fps) than a G20. The longer sight radius, and the red dot, are just the coup de grace (obviously understanding the red dot is going to add a lot of expense to the package!)

  8. lol… Austrian, B.S.!… Buy American!… Better Weapons!!!… Springfield!… [Have been making Guns for the United States Armies, since General George Washington, in 1771]. Glock is a Plastics Mogul, in 1971, he redesigned the 9mm, to fit his mold. Selling them to the American police, for a discounted rate; when, they were still using the 6 shot wheel guns!… A “Marketing Genius”, offering to buy the 9mm’s back, [and reselling them], while he sold the Police departments, the newer .40 calibers!.. Now, doing the same with the .45’s!…
    Yeeeesss, i Realize, “Springfields”, are Now being made in Croatia!… [ But, STILL, maintaining the High American Stanards!…].Thanks to our Congress, for raising the Taxes; and, chasing yet another, long-time, producing, American Company, to move abroad. [As, they did with “Maytag”!… Now, producing in Mexico!….].
    [W. T. F. Congress???].

    • Glock handguns have been manufactured (not just assembled) in Smyrna, GA, USA, for several years now. My latest Glock has “Made in USA” stamped on the frame, and “USA” stamped on the slide, along with a tiny U.S.-state-of-Georgia-shaped proofmark on the frame, slide, and barrel.

      • A glock that says “made in the USA’ isn’t American,

        It’s not anymore than a Toyota that says “made in the USA”.

        • I think the Glock employees gainfully employed in Smyrna, GA would disagree with your illusion of reality. They’re probably just as thankful to have jobs as any other American.

          Oh… and the U.A.W. members building Toyotas and Hondas probably feel the same way.

    • Are you really going to reference Springfield, which isn’t the original Springfield and makes all of the XD and XDm series in CROATIA?!?! Good God, people are stupid sometimes.

  9. You call it a “G10” in the first paragraph.

    I keep hoping actual self defense ammo that uses the power of the cartridge will become available someday. Stretched .40s with no extra power are a waste (might as well just use a .40; the ammo is cheaper) or loads that are designed to penetrate three feet (not good against bad guys) don’t cut the mustard.

    Same situation exists for practice ammo; it seems to all be stretch .40.

    • “stretched .40’s” is not a bad description. There are some loads, like Federal’s Hydra Shok, that show practically zero difference between the .40 S&W version and the 10mm version. Federal’s own ballistics show the 180-grain Hydra Shok at 1000 fps in .40, and 1030 fps in 10mm.

      CorBon, DoubleTap, and Buffalo Bore load the 10mm to more powerful levels. If you look at’s 10mm section, you can see a wide variety of published loads with their attendant weights, velocities, and energy levels. The Buffalo Bore TAC-XP, 155 grains, 1500 fps and 774 ft/lbs, would likely be a heck of a load. I tested the CorBon DPX version, same bullet but loaded 100 fps slower, and it was a superb performer; DoubleTap loads the same bullet to the same velocity as the DPX. (for comparison, that Hydra Shok is 1030 fps and 424 ft/lbs… paltry in comparison).

      DoubleTap also has a 125-grain version of the TAC-XP, rated at 1600 fps and 710 ft/lbs. I tried it, it’s great. I generally prefer a heavier bullet, but for those who love velocity, a true 1600 fps with a .357 Magnum-weight 125 grains… it’s a serious load.

      Underwood loads a 155-grain Gold Dot to 1500 fps, 775 ft/lbs of energy. I haven’t tested it, I don’t know if the Gold Dot performs properly at such a velocity, but if it does, that could be a seriously powerful defensive load.

      If you’re looking for ammo from one of the “major” brands, unfortunately there’s really only one of them that makes a full-power load, that’s Winchester’s SilverTip (175 grains at 1290 fps and 649 ft/lbs). And the SilverTip isn’t exactly modern bullet technology. But it’s what’s available; the other offerings from the major companies generally don’t even come close to 500 ft/lbs. And you can get 500 ft/lbs from a .45 ACP+P; heck, the Federal 185gr Hydra Shok in .45 ACP+P is rated at 524 ft/lbs and the Remington Golden Saber 185gr .45 ACP+P is rated at 534 ft/lbs.

      With any luck, this G40 will prove popular enough that some of the majors might offer a load or two in full power. Until then, if you want to draw out the power of the 10mm, you either have to load your own, or look to one of the smaller companies like Underwood, DoubleTap, CorBon or Buffalo Bore.

      • Sometimes I get the feeling that you study and memorize ballistics tables. If it’s a disorder you aren’t the only one who had it.

      • Also, unless I missed something in all that, none of it is practice ammo. It’s all super boutique ammo meant for someone who has just got to wring every last footpound out of his gun. (Many of these sorts of people shouldn’t be let near a reloading press.) I want more than a .40 but I *don’t* believe in pushing the envelope with something that can go KB! if you misjudge and find yourself on the wrong side of it by mistake.

        The stuff you mention is primarily stuff hot enough to push the envelope (having your gun break on you sucks) and in many cases I fear it’s meant for bears, not bad guys. Overpenetrating.

        For practice, I’d really like to see something that lands somewhere between 50-75 percent of the distance between “stretch 40” and “bust your gun full house”. It would have enough extra power to be worth shooting 10mm instead of a 40, BUT it wouldn’t shorten your gun’s lifespan. Call it “3/4 full house” or even “two pair” if I can mix metaphors.

        There’s got to be a happy medium between pushing the envelope enough to stress the gun, and producing something so fricking weak it might as well be .40, for practice purposes.

        • That TAC-XP bullet wouldn’t be my first pick for bear, nor the Gold Dot. Those are for two-legged predators. They’d probably work well on cougars also.

          180, 200 or 220 grain hardcast pills are a better bet, or the Corbon round nose penetrator bullet. Penetration is the name of the game in bear defense: take out the central nervous system, or failing that, break a major bone.

          A controlled-expansion hunting bullet like the Federal Trophy Bonded Vital Shok might be OK. If you find any, let me know.

  10. Glock has done more for 10mm than anyone since Col. Cooper. This isn’t my 10mm cup of tea, but I salute them for continuing their support of the caliber.


    Now the only thing left is for someone to make full-sized mag extensions, so I don’t have to play around with a dremel for a mag extension meant for a .45. Do that and this gun will be perfect.

    • The Glock 40/41 are slightly larger, but the G34 and G35 are almost exactly the same size as a square-butt four-inch K-frame S&W revolver, which used to be a standard police pistol that was carried both on- and off-duty (concealed).

      The Glock 40/41 are about the same size as a full-size 1911A1 pistol, which has also been carried concealed for decades, but the Glocks weigh less fully loaded than an all-steel 1911A1 does when it’s empty.

      So yes, if you were so inclined, any of these new Glocks could work for ccw, depending on the exact circumstances.

      • My G20 is a complete hogleg, even compared to my Government Model. The single stack 1911 just tucks in close and the full double-stack width of the Glock feels like it’s making me print something fierce. Because it is.

        (The G20 sure makes me feel good on lonely Western roads, though.)

        • With the correct holster, cover garment(s) and attitude, if you can conceal one, you can conceal the other, 95% of the time (my estimate, based on experience). A FBI-style forward-cant holster helps immeasurably, but some folks refuse to try/use these, and because of this attitude, effective concealment suffers.

          If a person takes a long drink of the online koolaid and uncritically embraces the ill-informed “Glocks are far too HUGE to conceal!” attitude, I wouldn’t be surprised to find that such a person has trouble successfully concealing a Glock (not saying that John M. has this problem, just pointing out that some folks do).

  12. The full power ballistics of the 10mm pistol are just about on par with a .38-40 or .44-40 rifle powered by a case full of FFFg. This means a good 10mm pistol is a near ballistic twin of the Winchester 1873 rifle – that you can comfortably wear on your hip!

  13. Glocks rule in 10mm..the 41mag has only 6rds..kicks like a cannon. .takes you a hospital visit before you can fire the 2nd glock 20 with 200gr gets 1350 and my 180gr got 1450fps with 6in kkm barrel. .15 shots is still more than 2 revolvers…lot lighter too.

  14. Well this is just downright retarded on Glock’s part.
    1. there are already longslide MOS conversions out there and have been for years.
    2. those conversions come with the threaded barrel if you want and sights as well.
    3. they end up being cheaper than what Glock says they are going to sell these for.
    4. you get to keep your original barrel and slide to quickly convert back if you want with the conversion kits.
    5. you can even get the kits in .460 Rowland, which is better ballistics-wise than the 10mm.

    They made 3 guns that are only going to sell to a very very small group of people while everyone has been clamoring for a 9mm version of the G42.

  15. A couple of interesting points: This powerhouse is less than one-inch longer than a standard 1911, has just over one extra inch of barrel, yet it’s no taller, no thicker, 10 ounces lighter, and carries more than twice as much ammo. Now that is one helluva package.

  16. Glock haters hate, Glock lovers love. This is thee best Glock pistol of alltime. Screw 460 rowland or the eagle in 44 and 50ae, the 10mm has the power and speed to do anything the other rounds do with the addition of larger capacity, more reliability, lighter firearm and better and cheaper shelf ammo selection if one does not reload. Opinions are like aholes everybody has one and most stink.


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