Glock 42 vs 43 Size Comparison
The Glock 43 is 0.32 in (8 mm) longer, 0.12 in (3 mm) taller and 0.08 in (2 mm) wider than the Glock 42. With an empty magazine it weighs 4.23 oz (120 g) more. Both drawn to scale from Glock's published dimensions.
Glock 42 vs 43 side by side
Glock A
Glock B
Side profile
From behind
- Slide width
- 0.83 in0.87 in
- Glock 43 is 0.04 in (1 mm) wider
- Overall width, with controls
- 0.98 in1.06 in
- Glock 43 is 0.08 in (2 mm) wider
Tap the drawing to flip between the Glock 42, the Glock 43 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 43 is 0.32 in (8 mm) longer, 0.12 in (3 mm) taller and 0.08 in (2 mm) wider than the Glock 42. With an empty magazine it weighs 4.23 oz (120 g) more.
- Glock 42: 5.94 in long, 4.13 in tall, 0.98 in wide, 3.25 in barrel. Glock 43: 6.26 in long, 4.25 in tall, 1.06 in wide, 3.41 in barrel.
One square is one inch. Real Glock photos sized to Glock's published dimensions, checked September 27, 2026.
Is the Glock 42 or 43 bigger?
The Glock 43 is the bigger pistol. Against the Glock 42 it is 0.32 in (8 mm) longer, 0.12 in (3 mm) taller and 0.08 in (2 mm) wider.
Glock 42 vs 43 dimensions
| Dimension | Glock 42 | Glock 43 | B vs A |
|---|---|---|---|
| Overall length | 5.94 in151 mm | 6.26 in159 mm | +0.32 in8 mm |
| Slide length | 5.75 in146 mm | 6.06 in154 mm | +0.31 in8 mm |
| Barrel length | 3.25 in83 mm | 3.41 in87 mm | +0.16 in4 mm |
| Height with magazine | 4.13 in105 mm | 4.25 in108 mm | +0.12 in3 mm |
| Overall width, with controls | 0.98 in25 mm | 1.06 in27 mm | +0.08 in2 mm |
| Slide width | 0.83 in21 mm | 0.87 in22 mm | +0.04 in1 mm |
| Trigger reach | 2.4 in61 mm | 2.56 in65 mm | +0.16 in4 mm |
| Weight, empty magazine | 13.76 oz390 g | 17.99 oz510 g | +4.23 oz120 g |
| Capacity, standard magazine | 6 rounds | 6 rounds | Same |
| Caliber | .380 ACP | 9mm | Different |
| Glock catalog | Current model | Current model |
Glock 42 vs 43 grip length
The Glock 43 stands 0.12 in (3 mm) taller than the Glock 42 with a magazine in (4.25 in against 4.13 in). Trigger reach, from the back of the grip to the trigger, is 2.56 in on the Glock 43 against 2.4 in on the Glock 42.
Glock 42 vs 43 barrel and slide length
The Glock 43 barrel is 0.16 in (4 mm) longer: 3.41 in against 3.25 in. Its slide is 0.31 in (8 mm) longer (6.06 in against 5.75 in).
Will a Glock 43 fit a Glock 42 holster?
Probably not well. The slides differ in width by 0.04 in (1 mm), and molded holsters retain on the slide. Holster makers mold for exact models, so check the maker's fit list before you buy.
Is the Glock 43 compact or subcompact?
Glock puts the Glock 43 in its subcompact slimline class and the Glock 42 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 42 or 43 today?
Glock 42 in stock
In stock now. One listing per model family.
Glock 43 in stock
In stock now. One listing per model family.
More Glock 42 and 43 comparisons
Frequently Asked Questions
How much smaller is the Glock 42 than the Glock 43?
0.32 in (8 mm) shorter, 0.12 in (3 mm) lower and 0.08 in (2 mm) narrower, by Glock's published dimensions.
Which is lighter, the Glock 42 or the Glock 43?
The Glock 42, by 4.23 oz (120 g) with an empty magazine: 13.76 oz (390 g) against 17.99 oz (510 g) for the Glock 43.
Which holds more rounds, the Glock 42 or the Glock 43?
Neither: both ship with a 6 round standard magazine.
Where do these Glock 42 and Glock 43 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 42 vs 43 Size Comparison”, https://gunpartpicker.net/tools/glock-size-comparison/glock-42-vs-43. Data from the GunPartPicker catalog and real community builds, prices checked November 11, 2026. Free to cite with attribution.
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