Glock 43X vs 45 Size Comparison
The Glock 45 is 0.94 in (24 mm) longer, 0.43 in (11 mm) taller and 0.25 in (6 mm) wider than the Glock 43X. With an empty magazine it weighs 4.4 oz (125 g) more. It holds 17 rounds in a standard magazine to the 43X's 10. Both drawn to scale from Glock's published dimensions.
Glock 43X vs 45 side by side
Glock A
Glock B
Side profile
From behind
- Slide width
- 0.87 in1 in
- Glock 45 is 0.13 in (3 mm) wider
- Overall width, with controls
- 1.1 in1.35 in
- Glock 45 is 0.25 in (6 mm) wider
Tap the drawing to flip between the Glock 43X, the Glock 45 and both.
Photos: Glock 17 Gen5 photo by Tony Webster, cut out by LeoPavouk (CC BY 2.0); Glock 43X photo by Kolomaznik (CC BY 4.0); Glock 17 Gen4 photo by Steve Dock, UK Ministry of Defence (OGL v1.0) Contains public sector information licensed under the Open Government Licence v1.0. Cut out and reshaped to each model's published size by GunPartPicker.
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Quick answer
The Glock 45 is 0.94 in (24 mm) longer, 0.43 in (11 mm) taller and 0.25 in (6 mm) wider than the Glock 43X. With an empty magazine it weighs 4.4 oz (125 g) more. It holds 17 rounds in a standard magazine to the 43X's 10.
- Glock 43X: 6.5 in long, 5.04 in tall, 1.1 in wide, 3.41 in barrel. Glock 45: 7.44 in long, 5.47 in tall, 1.35 in wide, 4.02 in barrel.
One square is one inch. Real Glock photos sized to Glock's published dimensions, checked September 27, 2026.
Is the Glock 43X or 45 bigger?
The Glock 45 is the bigger pistol. Against the Glock 43X it is 0.94 in (24 mm) longer, 0.43 in (11 mm) taller and 0.25 in (6 mm) wider.
Glock 43X vs 45 dimensions
| Dimension | Glock 43X | Glock 45 | B vs A |
|---|---|---|---|
| Overall length | 6.5 in165 mm | 7.44 in189 mm | +0.94 in24 mm |
| Slide length | 6.06 in154 mm | 6.85 in174 mm | +0.79 in20 mm |
| Barrel length | 3.41 in87 mm | 4.02 in102 mm | +0.61 in15 mm |
| Height with magazine | 5.04 in128 mm | 5.47 in139 mm | +0.43 in11 mm |
| Overall width, with controls | 1.1 in28 mm | 1.35 in34 mm | +0.25 in6 mm |
| Slide width | 0.87 in22 mm | 1 in25 mm | +0.13 in3 mm |
| Trigger reach | 2.64 in67 mm | 2.68 in68 mm | +0.04 in1 mm |
| Weight, empty magazine | 18.7 oz530 g | 23.1 oz655 g | +4.4 oz125 g |
| Capacity, standard magazine | 10 rounds | 17 rounds | +7 |
| Caliber | 9mm | 9mm | Same |
| Glock catalog | Current model | Current model |
Glock 43X vs 45 grip length
The Glock 45 stands 0.43 in (11 mm) taller than the Glock 43X with a magazine in (5.47 in against 5.04 in). Trigger reach, from the back of the grip to the trigger, is 2.68 in on the Glock 45 against 2.64 in on the Glock 43X. The two frames are different families (slimline single stack and double stack), so the height gap is overall height, not only grip length.
Glock 43X vs 45 barrel and slide length
The Glock 45 barrel is 0.61 in (15 mm) longer: 4.02 in against 3.41 in. Its slide is 0.79 in (20 mm) longer (6.85 in against 6.06 in).
Will a Glock 45 fit a Glock 43X holster?
Usually not. The Glock 45 is a double stack frame and a Glock 43X holster is molded around a slimline single stack frame, so the fit and retention will be wrong. Holster makers mold for exact models, so check the maker's fit list before you buy.
Is the Glock 45 compact or subcompact?
Glock puts the Glock 45 in its crossover class and the Glock 43X in its subcompact slimline class. Here is every current Glock at the same scale.
Subcompact slimline
Subcompact
Compact
Full size
Every card is to the same scale, lined up at the slide rear. Tap one to compare it or look at it alone.
Where can I buy a Glock 43X or 45 today?
Glock 43X in stock
In stock now. One listing per model family.
Glock 45 in stock
In stock now. One listing per model family.
More Glock 43X and 45 comparisons
Frequently Asked Questions
How much smaller is the Glock 43X than the Glock 45?
0.94 in (24 mm) shorter, 0.43 in (11 mm) lower and 0.25 in (6 mm) narrower, by Glock's published dimensions.
Which is lighter, the Glock 43X or the Glock 45?
The Glock 43X, by 4.4 oz (125 g) with an empty magazine: 18.7 oz (530 g) against 23.1 oz (655 g) for the Glock 45.
Which holds more rounds, the Glock 43X or the Glock 45?
The Glock 45: 17 rounds in a standard magazine against 10 for the Glock 43X, as Glock's spec pages list them.
Where do these Glock 43X and Glock 45 numbers come from?
From Glock's own US spec pages, checked September 27, 2026. Both guns are shown at one scale, as real Glock photos reshaped to those numbers.
Cite this tool: GunPartPicker, “Glock 43X vs 45 Size Comparison”, https://gunpartpicker.net/tools/glock-size-comparison/glock-43x-vs-45. Data from the GunPartPicker catalog and real community builds, prices checked November 11, 2026. Free to cite with attribution.
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