Glock Gen 6 vs Gen 5: What Changed, Spec by Spec
Glock's Gen 6 looks like every Glock before it, on purpose. The real differences are in the grip, the trigger, the optics mount and the internals. We pulled Glock's own technical data for the G17, G19 and G45 in both generations, so here's exactly what changed, what didn't, and which Gen 5 parts carry over.
The short version
- Same size, lighter weight. Barrel lengths, overall lengths, slide lengths and heights are unchanged. Each Gen 6 is 30 to 41 grams lighter without a magazine.
- Better grip. Gen 6 adds a palm swell, an extended thumb rest, an enlarged beavertail, an undercut trigger guard and a new grip texture.
- Shorter reach and a flat trigger. Trigger distance drops from 70 mm to 68 mm, and a flat-faced trigger is standard. Glock lists the same 26 N trigger pull for both.
- New optics system. Gen 5 MOS used adapter plates. Gen 6 screws optics directly into the slide, with three included plates.
- Same price. Guns.com reported a $745 MSRP for Gen 6, the same catalog price as Gen 5 MOS models.
- Mags carry over; many internals don't. Guns.com reports legacy double-stack 9mm magazines and sights work, but the slide, trigger and most internals are new.
Specs side by side
All numbers are from Glock's U.S. technical data. Weights are without a magazine.
| Spec | G19 Gen5 | G19 Gen6 | G17 Gen5 | G17 Gen6 | G45 Gen5 | G45 Gen6 |
|---|---|---|---|---|---|---|
| Barrel | 4.02 in | 4.02 in | 4.49 in | 4.49 in | 4.02 in | 4.02 in |
| Overall length | 7.28 in | 7.28 in | 7.95 in | 7.95 in | 7.44 in | 7.44 in |
| Weight, no mag | 610 g (21.52 oz) | 570 g (20.11 oz) | 630 g (22.22 oz) | 600 g (21.16 oz) | 616 g (21.73 oz) | 575 g (20.28 oz) |
| Width | 1.34 in | 1.35 in | 1.34 in | 1.34 in | 1.34 in | 1.35 in |
| Height with mag | 5.04 in | 5.04 in | 5.47 in | 5.47 in | 5.47 in | 5.47 in |
| Sight radius (polymer) | 153 mm | 157 mm | 165 mm | 169 mm | 153 mm | 157 mm |
| Trigger distance | 70 mm | 68 mm | 70 mm | 68 mm | 70 mm | 68 mm |
| Trigger pull | 26 N | 26 N | 26 N | 26 N | 26 N | 26 N |
| Standard capacity | 15 | 15 | 17 | 17 | 17 | 17 |
Gen 5 data comes from Glock's law-enforcement product pages, since its Gen 5 commercial pages are no longer online.
Two numbers jump out. First, weight: the G19 sheds 40 grams and the G45 sheds 41. That's not much on paper, but you'll notice it on the belt. Second, sight radius: Gen 6 gains 4 mm on every model with polymer sights, even though the slide length is unchanged.
Grip and ergonomics
This is the headline change. Glock's announcement describes an ergonomic frame "with palm swell, extended thumb rest, and enlarged beavertail," plus a grip texture that "combines 2 textures into one" over a larger surface area. The trigger guard is now undercut, and the reach to the trigger is shorter.
| Feature | Gen 5 | Gen 6 |
|---|---|---|
| Finger grooves | None | None |
| Palm swell | No | Yes |
| Thumb rest | No | Extended thumb rest, both sides |
| Beavertail | Standard | Enlarged, frame-mounted |
| Trigger guard | Standard | Undercut |
| Grip texture | Gen 5 texture | New Gen6 texture, larger area |
| Slide serrations | Front serrations (per Glock's G19 Gen5 page) | Deeper-angled serrations |
| Slide stop | Ambidextrous | Ambidextrous, enlarged border molded into the frame |
Guns.com says the Gen 6 ships with two interchangeable backstraps and is compatible with Gen 5 backstraps. In hand, the thumb rest and palm swell are the changes shooters notice first. If you've been paying for aftermarket stippling or a frame job to get a gas pedal and a high-grip undercut, Gen 6 gives you much of that from the factory.
Trigger
Gen 6 comes standard with a flat-faced trigger that, per Glock, "maintains the Safe Action System." Glock lists the same 26 N pull as Gen 5 in its technical data. The practical difference is finger placement and reach: a flat face gives a more consistent contact point, and the 2 mm shorter trigger distance helps smaller hands. Guns.com found the Gen 6 trigger "to break a bit better" than earlier Glock packs.
Optics: MOS vs the Gen 6 system
Gen 5 MOS models used Glock's Modular Optic System, with adapter plates between the slide and the optic. Gen 6 drops MOS. Standard-frame Gen6 pistols, in Glock's words, "come optic-ready with three optic plates that allow various optics to be screwed directly into the slide." According to Guns.com, the optic bed sits deeper for a lower height over bore, and the included plates cover RMR, Shield/DeltaPoint/Holosun K and C-More footprints. Guns.com also reports Glock sealed the extractor channel so thread locker from mounting an optic can't migrate into the slide.
Two practical notes: every Gen 6 is optics-ready, so there's no separate MOS model to shop for. And if you have optics mounted on Gen 5 MOS plates, plan on using the Gen 6 plates instead.
Parts and magazine compatibility
Glock hasn't published a parts-compatibility chart. The best detail comes from Guns.com's visit to Glock, so treat this table as reported, not official, and confirm with a Glock armorer before swapping parts.
| Part | Gen 5 part in a Gen 6? |
|---|---|
| Double-stack 9mm magazines (Gen 3, 4 and 5) | Yes |
| Glock-pattern sights | Yes |
| Backstraps | Yes (Gen 5 straps) |
| Locking block, magazine release | Yes |
| Firing pin and spring | Yes |
| Slide lock and spring | Yes |
| Trigger pin, trigger housing, trigger bar, connector | Yes |
| Recoil spring assembly | Reported both ways; check before buying |
| Slide, trigger, extractor and most other internals | No, Gen 6 only |
| MOS optic plates | No |
Why the caveat on the recoil spring? Guns.com's parts list includes the recoil spring assembly among the legacy parts that work, but a photo caption in the same article says Gen 6 moves to a new guide rod. We won't guess. Holsters are similar: Guns.com says most Gen 5 holsters fit because external dimensions are retained, but recommends testing retention on precision-molded Kydex because of the new beavertail and slide stop.
Price and availability
| Item | Gen 5 | Gen 6 |
|---|---|---|
| MSRP | $745 for MOS models, per Guns.com | $745, per Guns.com |
| Availability | Several Gen 5 variants discontinued in late 2025; still common in dealer stock and used | Shipping since Jan. 20, 2026 |
| Models | Wide range of sizes and calibers | G17, G19, G45 in 9mm (U.S.) |
Live Gen 6 status from our database:
| Product | Status | MSRP | Announced |
|---|---|---|---|
| Glock 17 Gen 6 | Shipping | $745 | Dec 6, 2025 |
| Glock 19 Gen 6 | Shipping | $745 | Dec 6, 2025 |
| Glock 45 Gen 6 | Shipping | $745 | Dec 6, 2025 |
Should you buy Gen 6 or Gen 5?
Buy Gen 6 if you want the best factory ergonomics Glock has made, plan to run a red dot, or are buying your first Glock. At the same MSRP as a Gen 5 MOS, the lighter frame, thumb rest, undercut guard and direct-mount optics make it the better gun out of the box.
Buy Gen 5 if you find a good deal on one, you need a size or caliber Gen 6 doesn't offer yet, or you want to stay parts-compatible with Gen 5 guns you already own. A Gen 5 is still a proven Glock, and the right to choose your own sidearm, from any generation, is yours, not a regulator's.
Whichever you pick, you're carrying a design that has served lawmen and citizens for four decades. More on the new generation on our Glock Gen 6 hub, or compare it against other new 9mm releases like the SIG P385 in our new 9mm pistols of 2026.
Frequently asked questions
- What is the difference between Glock Gen 5 and Gen 6?
- Gen 6 adds a palm swell, extended thumb rest, enlarged beavertail, undercut trigger guard, new grip texture, flat-faced trigger, a 68 mm trigger reach instead of 70 mm, and an optic system that screws optics directly into the slide. Dimensions are unchanged and each model is lighter.
- Is the Glock Gen 6 lighter than Gen 5?
- Yes. Per Glock's specs, the G19 Gen6 is 570 g versus 610 g, the G17 Gen6 is 600 g versus 630 g, and the G45 Gen6 is 575 g versus 616 g, all without a magazine.
- Do Gen 5 magazines fit Gen 6 Glocks?
- Guns.com reports that Gen 6 pistols accept Gen 3, Gen 4 and Gen 5 double-stack 9mm magazines.
- Will my Gen 5 holster fit a Gen 6?
- Guns.com says most Gen 5 holsters fit, but recommends checking retention on precision-molded Kydex holsters because of the new beavertail and slide stop.
- Is the Gen 6 more expensive than Gen 5?
- Guns.com reported a $745 MSRP for Gen 6, the same catalog price as Gen 5 MOS models.
- Does the Gen 6 use MOS plates?
- No. Gen 6 drops MOS. Standard-frame Gen 6 pistols ship with three optic plates and optics screw directly into the slide.
Sources
- Glock: 6th Generation announcement (Dec. 6, 2025)
- Glock: G19 Gen6 technical data
- Glock: G19 Gen5 technical data
- Glock: G17 Gen6 technical data
- Glock: G17 Gen5 technical data
- Glock: G45 Gen6 technical data
- Glock: G45 (Gen5) technical data
- Guns.com: A Deep Dive on the New Glock Gen 6 Models
- Soldier Systems Daily: Glock discontinued models list (Oct. 21, 2025)
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