Head to head

Glock 45 MOS vs Glock 19 Gen5 MOS

By Cole Harlan, EditorUpdated Nov 5, 2026How we verifyEditorial standards

The biggest printed difference is the grip: Glock lists a height including magazine of 5.47 inch for the G45 MOS against 5.04 inch for the G19 Gen5 MOS, with a standard capacity of 17 against 15. Barrel (4.02 inch), slide length (6.85 inch), overall width (1.34 inch) and trigger pull (26 N) are printed the same. Figures are copied from Glock’s own law-enforcement pages, checked November 5, 2026.

At a glance

Spec (Glock label)	GLOCK G45 MOS	GLOCK G19 Gen5 MOS
Caliber	9x19 mm	9x19 mm
Mag. capacity	Standard: 17; optional: 19 / 24 / 31 / 33	Standard: 15; optional: 17 / 24 / 10
Barrel length	102 mm \| 4.02 inch	102 mm \| 4.02 inch
Length (overall)	189 mm \| 7.44 inch	185 mm \| 7.28 inch
Slide length	174 mm \| 6.85 inch	174 mm \| 6.85 inch
Width (overall)	34 mm \| 1.34 inch	34 mm \| 1.34 inch
Slide width	25.5 mm \| 1.0 inch	25.5 mm \| 1.00 inch
Height incl. mag.	139 mm \| 5.47 inch	128 mm \| 5.04 inch
Line of sight (polymer / steel / GNS)	157 mm \| 6.18 inch / 156 mm \| 6.14 inch / 155 mm \| 6.10 inch	157 mm \| 6.18 inch / 156 mm \| 6.14 inch / 155 mm \| 6.10 inch
Weight without magazine	616 g \| 21.73 oz	605 g \| 21.34 oz
Weight with empty magazine	695 g \| 24.52 oz	675 g \| 23.81 oz
Weight with loaded magazine	860 g \| 30.34 oz	850 g \| 29.98 oz
Trigger pull	26 N	26 N
Trigger distance	70 mm \| 2.76 inch	70 mm \| 2.76 inch
Source (checked Nov. 5, 2026)	us.glock.com G45 MOS	us.glock.com G19 Gen5 MOS

Like for like: both rows come from the same kind of Glock technical-data table, so the weights and heights use the same definitions. Both models are MOS (the page titles say so). These are Glock’s law-enforcement pages; commercial pages for the same models may print different figures, and we did not compare them here. Glock notes its technical data “are rounded and do not reflect tolerances.” We list no prices.

Which to pick (on paper)

If you want the larger standard capacity: the G45 MOS lists a standard 17; the G19 Gen5 MOS lists a standard 15.
If you want the shorter grip and lower printed weight: the G19 Gen5 MOS lists 5.04 inch height incl. mag. and 23.81 oz with an empty magazine, against 5.47 inch and 24.52 oz for the G45 MOS.
If you care about slide, barrel, width or trigger pull: Glock prints the same figures for both (6.85 inch slide, 4.02 inch barrel, 1.34 inch width, 26 N).
If you care about overall length: 7.44 inch for the G45 MOS against 7.28 inch for the G19 Gen5 MOS.

We have not range-tested these; facts above are from the makers.

Not yet verified

Which optic footprints each MOS plate set covers; check the exact SKU with Glock before buying an optic.
Commercial-page figures for these two models, which we did not read for this page.
Prices are not shown.

Frequently asked questions

How much taller is the Glock 45 MOS than the Glock 19 Gen5 MOS?

Glock lists a height including magazine of 139 mm (5.47 inch) for the G45 MOS and 128 mm (5.04 inch) for the G19 Gen5 MOS.

What is the standard magazine capacity of each?

Glock lists a standard capacity of 17 for the G45 MOS and 15 for the G19 Gen5 MOS.

Do the G45 MOS and G19 Gen5 MOS share a barrel length?

Glock lists 102 mm (4.02 inch) for both, with a 174 mm (6.85 inch) slide length on both.

Glock 45 MOS vs Glock 19 Gen5 MOS

At a glance

Which to pick (on paper)

Not yet verified

Frequently asked questions

Sources

Keep exploring

At a glance

Which to pick (on paper)

Not yet verified

Frequently asked questions

Sources

Keep exploring

The Gun Release Report