Head to head

Glock 45 vs G19 Gen5

By Cole Harlan, EditorUpdated Nov 4, 2026How we verifyEditorial standards

Glock describes the G45 as a “compact crossover” that “combines a compact slide with a full size frame.” The G19 Gen5 is the compact on a compact frame. Figures below are copied from Glock’s G45 and G19 Gen5 technical-data tables, checked November 4, 2026. For the Gen 6 versions of all three Glocks see the Gen 6 comparison; this page is about the Gen 5 G19 and the G45.

At a glance

Spec (Glock label)	GLOCK 45	GLOCK 19 Gen5
Caliber	9x19 mm	9x19 mm
Mag. capacity (standard)	17	15
Mag. capacity (optional)	19 / 24 / 31 / 33	15 / 17 / 24 / 31 / 33
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
Height incl. mag.	139 mm \| 5.47 inch	128 mm \| 5.04 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
Weight, without magazine	616 g \| 21.73 oz	610 g \| 21.52 oz
Weight, with empty magazine	694 g \| 24.48 oz	670 g \| 23.63 oz
Weight, with loaded magazine	860 g \| 30.34 oz	855 g \| 30.16 oz
Line of sight (polymer)	153 mm \| 6.02 inch	153 mm \| 6.02 inch
Trigger distance	70 mm \| 2.76 inch	70 mm \| 2.76 inch
Trigger pull	26 N	26 N
Source (checked Nov. 4, 2026)	us.glock.com G45	us.glock.com G19 Gen5

Glock’s U.S. site carries the full Dimension tables for these models on its law-enforcement product pages, which is where every number above comes from. Glock prints each value in millimeters and inches and says the data are rounded and do not reflect tolerances. We list no price: those pages print no MSRP.

What the tables show

Same top end: Glock lists the same barrel length (102 mm | 4.02 inch), slide length (174 mm | 6.85 inch), overall width (34 mm | 1.34 inch) and slide width for both.
Grip height: the G45 lists 139 mm | 5.47 inch height including magazine, the same figure Glock prints for the G17 Gen5; the G19 Gen5 lists 128 mm | 5.04 inch.
Capacity: standard 17 on the G45, 15 on the G19 Gen5.
Overall length: 189 mm | 7.44 inch on the G45 vs 185 mm | 7.28 inch on the G19 Gen5.

Which to pick (on paper)

If you want the compact slide with the larger grip and standard magazine: the G45.
If the shortest height including magazine and the lightest listed weight matter: the G19 Gen5 at 128 mm | 5.04 inch and 610 g | 21.52 oz without magazine.

We have not range-tested these; facts below are from the maker.

Frequently asked questions

What is the difference between the Glock 45 and Glock 19 Gen5?

Glock lists the same 102 mm (4.02 inch) barrel and 174 mm (6.85 inch) slide on both. The G45 lists a 139 mm (5.47 inch) height including magazine and a standard capacity of 17; the G19 Gen5 lists 128 mm (5.04 inch) and 15.

What does Glock mean by compact crossover?

Glock’s G45 page describes it as combining a compact slide with a full size frame.

Is the Glock 45 longer than the G19 Gen5?

Slightly, on Glock’s tables: 189 mm (7.44 inch) overall for the G45 and 185 mm (7.28 inch) for the G19 Gen5, with the same slide length of 174 mm (6.85 inch).

Glock 45 vs G19 Gen5

At a glance

What the tables show

Which to pick (on paper)

Frequently asked questions

Sources

Keep exploring

At a glance

What the tables show

Which to pick (on paper)

Frequently asked questions

Sources

Keep exploring

The Gun Release Report