Head to head

Glock 45 vs Glock 17 Gen5

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

Both are 9x19 mm pistols with a standard 17-round magazine and the same 139 mm (5.47 inch) height. Glock lists the G45 with a 102 mm (4.02 inch) barrel and 189 mm (7.44 inch) overall length, and the G17 Gen5 with a 114 mm (4.49 inch) barrel and 202 mm (7.95 inch) length. Every figure is copied from the technical-data tables on Glock’s U.S. law-enforcement product pages, checked November 5, 2026.

At a glance

Spec (Glock label)	GLOCK 45	GLOCK 17 Gen5
Caliber	9x19 mm	9x19 mm
Mag. capacity (standard)	17	17
Mag. capacity (optional)	19 / 24 / 31 / 33	19 / 24 / 31 / 33
Barrel length	102 mm \| 4.02 inch	114 mm \| 4.49 inch
Length (overall)	189 mm \| 7.44 inch	202 mm \| 7.95 inch
Slide length	174 mm \| 6.85 inch	186 mm \| 7.32 inch
Height incl. mag.	139 mm \| 5.47 inch	139 mm \| 5.47 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	630 g \| 22.22 oz
Weight, with empty magazine	694 g \| 24.48 oz	708 g \| 24.97 oz
Weight, with loaded magazine	860 g \| 30.34 oz	945 g \| 33.33 oz
Line of sight (polymer)	153 mm \| 6.02 inch	165 mm \| 6.50 inch
Trigger distance	70 mm \| 2.76 inch	70 mm \| 2.76 inch
Trigger pull	26 N	26 N
Printed MSRP	Not yet verified	Not yet verified
Source (checked Nov. 5, 2026)	us.glock.com G45 (LE)	us.glock.com G17 Gen5 (LE)

Glock prints each value in millimeters and inches and notes that its technical data are rounded and do not reflect tolerances. Weights are shown on Glock’s three bases (without magazine, with empty magazine, with loaded magazine) and each row compares the same basis. Glock’s G45 page describes it as a “compact crossover,” a compact slide on a full-size frame. These are the Gen5 law-enforcement tables, not the Gen6 models. The law-enforcement pages print no price, so we list none.

Which to pick (on paper)

If the shorter barrel and length matter: the G45, at a 102 mm barrel and 189 mm overall against 114 mm and 202 mm.
If you want the longer line of sight: the G17 Gen5, at 165 mm (polymer) against 153 mm for the G45.
If the loaded weight matters: the G45 at 860 g (30.34 oz) against 945 g (33.33 oz) for the G17 Gen5. Without a magazine the two are 616 g and 630 g.
If grip height, width, capacity or trigger pull decide it: Glock lists the same 139 mm height, 34 mm width, 17-round standard magazine and 26 N for both, so they do not separate the two on paper.

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

Not yet verified

A printed MSRP on either law-enforcement page.
Accessory rail and optic readiness, which neither table lists.

Frequently asked questions

How many rounds do the Glock 45 and Glock 17 Gen5 hold?

Glock lists a standard magazine capacity of 17 for both. Optional capacities are 19 / 24 / 31 / 33 for both.

How long are the barrels?

Glock lists 102 mm (4.02 inch) for the G45 and 114 mm (4.49 inch) for the G17 Gen5.

Which is heavier, the Glock 45 or the Glock 17 Gen5?

The G17 Gen5 on Glock’s table: 945 g (33.33 oz) with a loaded magazine against 860 g (30.34 oz) for the G45. Without a magazine the figures are 630 g and 616 g.

Glock 45 vs Glock 17 Gen5

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