Glock 47 vs Glock 17 – What’s the Difference?
Glock 47 vs Glock 17 – What’s the Difference?
Comparing Glock 47 vs Glock 17 confuses a lot of buyers because the two pistols look almost identical. They share the same size, barrel length, and standard capacity.
In simple terms, the Glock 17 is GLOCK’s standard full-size 9mm, while the Glock 47 MOS puts a G17-length slide on a G45-style frame so its slide can be swapped with other Gen5 MOS models.
If you are also choosing ammo for your new pistol, see our Best 9mm Ammo guide or browse more side-by-side pages in our comparison hub.
Quick Verdict
For most buyers:
- Glock 17 is the better choice for most buyers because it is GLOCK’s current full-size model in V and Gen6 versions
- Glock 47 MOS is the better choice if you want to swap slides with a Gen5 MOS G19 or G45
Winner for most users: Glock 17 — the same size and capacity as the G47, and it is still part of GLOCK’s current lineup.
Glock 47 vs Glock 17 Comparison Table
| Feature | Glock 47 MOS | Glock 17 |
|---|---|---|
| Size Class | Full-size | Full-size |
| Caliber | 9mm (9x19) | 9mm (9x19) |
| Standard Capacity | 17 rounds | 17 rounds |
| Barrel Length | 4.49 in. | 4.49 in. |
| Overall Length | 7.95 in. | 7.95 in. |
| Height (with magazine) | 5.47 in. | 5.47 in. |
| Optic Ready | Yes (MOS) | Yes (Gen6) |
| Weight (empty magazine) | 25.93 oz | 23.99 oz (Gen6) |
| Best For | Slide-swapping with Gen5 MOS models | Most full-size 9mm buyers |
Glock 47 Overview
The Glock 47 MOS was developed for U.S. Customs and Border Protection in 2019 and later released to the commercial market. GLOCK says it combines a G17 Gen5 MOS slide with a G45 frame.
According to GLOCK, the G47 MOS keeps parts compatibility with the G17 Gen5 MOS, G19 Gen5 MOS, and G45 MOS. That lets owners swap slides to change the pistol’s length.
Glock 17 Overview
The Glock 17 is GLOCK’s standard full-size 9mm pistol, with a 4.49-inch barrel and a 17-round standard magazine.
GLOCK’s current lineup includes the G17 V and the optic-ready G17 Gen6, which adds a palm swell, thumb rest, and flat-faced trigger.
Size and Dimensions
Based on GLOCK’s published specs, the two pistols have the same barrel length, overall length, height, and width. The G47 MOS is listed at 25.93 ounces with an empty magazine, versus 23.99 ounces for the G17 Gen6.
In daily use, you will not notice a size difference. The differences are in the frame design and which slides it can accept.
Availability
GLOCK’s 2026 portfolio update lists the G47 MOS among the models scheduled for discontinuation. You will mostly find it as remaining or used inventory going forward.
The Glock 17, by contrast, continues in GLOCK’s lineup as the V and Gen6 models. Check the listing for the exact model and generation you are buying.
Capacity and Magazines
Both pistols hold 17 rounds as standard and use standard double-stack Glock 9mm magazines.
Browse aftermarket options like the Magpul PMAG 17 for Glock 17. Magazine capacity limits vary by state — always check our ammo and magazine laws guide.
Pros and Cons
Glock 47 MOS
Pros:
- Optic-ready MOS slide
- Slide swaps with G19 and G45 Gen5 MOS
- 17-round standard capacity
Cons:
- Scheduled for discontinuation per GLOCK
- Slightly heavier
Glock 17
Pros:
- Current V and Gen6 production
- Optic-ready Gen6 version
- 17-round standard capacity
Cons:
- No slide-swap advantage
- Harder to conceal than a compact
Who Should Choose What?
Choose the Glock 47 MOS if you already own a Gen5 MOS G19 or G45, or you like the idea of swapping slides on one frame.
Choose the Glock 17 if you simply want GLOCK’s current full-size 9mm for home, range, or duty-style use.
Final Verdict
The Glock 47 and Glock 17 are the same size and hold the same 17 rounds. The choice really comes down to frame design and availability.
For most buyers, the Glock 17 is the better pick. If slide-swapping matters to you, the G47 MOS is still a great choice while it lasts.
Continue your research with our Best 9mm Ammo guide, our FMJ vs Hollow Point 9mm comparison, and our comparison hub.
Frequently Asked Questions
What is the difference between the Glock 47 and Glock 17?
The frame. GLOCK built the G47 MOS with a G17-length slide on a G45 frame, so its slide can be swapped with other Gen5 MOS models.
Is the Glock 47 discontinued?
GLOCK’s 2026 portfolio update lists the G47 MOS among models scheduled for discontinuation.
Can you put a Glock 19 slide on a Glock 47?
GLOCK says the G47 MOS is compatible with the G19 Gen5 MOS, which lets owners swap slides.
Once you have picked your pistol, stock up in our 9mm ammo category and browse our Glock holsters. Buying online? See our how to buy guns online guide.