Head to head

FN 509 Compact vs Glock 19 Gen5

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

The biggest printed difference is weight, and it is not a clean pair: FN lists 25.5 oz for the 509 Compact without saying whether a magazine is in it, while Glock lists 21.52 oz without a magazine, 23.63 oz with an empty one and 30.16 oz loaded for the G19 Gen5. Barrels are 3.7″ (FN) and 4.02 inch (Glock). Every figure is copied from each maker’s own product page, checked November 5, 2026.

At a glance

Spec (maker label)	FN 509 Compact	GLOCK 19 Gen5
Caliber	9mm	9x19 mm
Operation	Double-action / striker-fired	Not yet verified
Magazine capacity	10 or 12/15 Rd.	Standard: 15; optional 15 / 17 / 24 / 31 / 33
Barrel length	3.7″	102 mm \| 4.02 inch
Overall length	6.8″	185 mm \| 7.28 inch
Height	5″ / 4.6″ (FN prints two heights)	128 mm \| 5.04 inch (Height incl. Mag.)
Width	1.35″	34 mm \| 1.34 inch (Width, Overall); slide width 25.5 mm \| 1.00 inch
Weight	25.5 oz. (magazine state not stated)	Without magazine: 610 g \| 21.52 oz; empty magazine: 670 g \| 23.63 oz; loaded magazine: 855 g \| 30.16 oz
Trigger pull	5.5 - 7.7 lb.	26 N
Sight measure	Sight Radius: 5.6″	Not yet verified
Printed MSRP	$639.00	Not yet verified (no price on the law-enforcement table)
Source (checked Nov. 5, 2026)	fnamerica.com FN 509 Compact	us.glock.com G19 Gen5

Like for like: FN prints one weight, 25.5 oz., and does not say whether it is with or without a magazine, so we do not line it up against any single Glock figure and we do not subtract. FN prints two heights (5″ and 4.6″) without saying which is which; Glock’s 5.04 inch is “incl. Mag.”. Trigger pull is in different units (pounds as a range for FN, newtons for Glock) and we do not convert. FN’s page covers the standard 509 Compact (non-MRD); this page uses the Glock G19 Gen5 table, not the MOS. For the larger FN, see FN 509 Midsize vs Glock 19 Gen5.

Which to pick (on paper)

If you want the shorter printed barrel and overall length: FN lists a 3.7″ barrel and 6.8″ length; Glock lists 4.02 inch and 7.28 inch.
If you want the lighter printed weight: Glock lists 21.52 oz without a magazine and 23.63 oz with an empty one. FN lists 25.5 oz with no magazine state, so the two are not a clean pair.
If you want a 10-round option named on the spec line: FN lists “10 or 12/15 Rd.”; Glock lists a standard 15 with optional 15 / 17 / 24 / 31 / 33.
If trigger pull wording matters: FN prints a 5.5 - 7.7 lb. range; Glock prints 26 N. We have not converted or tested either.
If the printed price matters: FN prints $639.00 for the 509 Compact; the Glock table we read prints none.

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

Not yet verified

Whether the FN 509 Compact weight is with or without a magazine, and which of its two heights applies to which magazine.
A Glock price and the Glock operation line (not read on that table).
Optic-ready wording for either pistol on the pages we read.

Frequently asked questions

How do the FN 509 Compact and Glock 19 Gen5 compare in weight?

FN lists the 509 Compact at 25.5 oz without stating a magazine state. Glock lists the G19 Gen5 at 21.52 oz without a magazine, 23.63 oz with an empty magazine and 30.16 oz loaded.

What are the barrel lengths?

FN lists a 3.7 inch barrel for the 509 Compact. Glock lists 102 mm (4.02 inch) for the G19 Gen5.

Why does this page not subtract the weights?

FN does not say whether its 25.5 oz includes a magazine, so it cannot be matched to Glock's without-magazine, empty-magazine or loaded figures.

FN 509 Compact vs Glock 19 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