Head to head

Glock 34 Gen5 MOS vs G17 Gen5 MOS

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

Both are full-size 9mm Glocks that take the same 17-round magazine as standard and both are cut for optics. Glock lists the G34 as a Competition model with a longer barrel and slide, and the G17 as the Standard model. Specs below are quoted from Glock’s two law-enforcement product pages, read on November 5, 2026. Glock’s commercial catalog URL for the G34 did not load that day, so these are the LE listings.

At a glance

G34 Gen5 MOS
G17 Gen5 MOS

Spec	G34 Gen5 MOS	G17 Gen5 MOS
Glock class label	Competition	Standard
Caliber	9x19 mm	9x19 mm
Mag. capacity	Standard: 17; Optional: 10 / 24	Standard: 17; Optional: 10 / 24
Barrel length	135 mm / 5.31 inch	114 mm / 4.49 inch
Weight, without magazine	665 g / 23.46 oz	625 g / 22.05 oz
Weight, with empty magazine	743 g / 26.21 oz	705 g / 24.87 oz
Weight, with loaded magazine	980 g / 34.57 oz	945 g / 33.33 oz
Trigger pull	24 N	26 N
Length (overall)	222 mm / 8.74 inch	202 mm / 7.95 inch
Slide length	207 mm / 8.15 inch	186 mm / 7.32 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	139 mm / 5.47 inch
Line of sight (polymer / steel / GNS)	191 / 190 / 189 mm (7.52 / 7.48 / 7.44 inch)	169 / 168 / 167 mm (6.65 / 6.61 / 6.57 inch)
Trigger distance	70 mm / 2.76 inch	70 mm / 2.76 inch
Source (checked Nov. 5, 2026)	us.glock.com G34 Gen5 MOS	us.glock.com G17 Gen5 MOS

Glock notes that its technical data are rounded, do not reflect tolerances and may be altered without notice. Glock’s own pages print the overall length and trigger distance with a double-asterisk footnote mark; we have not verified what that footnote says.

What the longer slide changes on paper

Barrel and slide: the G34 lists a 135 mm barrel against 114 mm, a 207 mm slide against 186 mm, and 222 mm overall length against 202 mm. That is 21 mm more barrel, slide and overall length, by Glock’s numbers.
Sight radius: Glock’s line-of-sight figures run 22 mm longer on the G34 (191 mm vs 169 mm on the polymer-sight row).
Weight: 40 g more without a magazine (665 g vs 625 g) and 35 g more loaded (980 g vs 945 g).
Trigger pull: Glock prints 24 N for the G34 and 26 N for the G17.
Same on both: caliber, standard capacity, width, slide width, height with magazine and trigger distance.

On the plain, non-MOS LE pages the same pattern holds: the G34 page lists a 135 mm barrel and 207 mm slide, and the G17 Gen5 page a 114 mm barrel and 186 mm slide. Weights differ a little from the MOS pages, so compare MOS to MOS.

Which to pick (on paper)

Longer sight radius and barrel for range or competition use: the G34, which Glock labels Competition.
Shorter slide and overall length, with the same height and width: the G17.

We have not range-tested either. These are law-enforcement listings, so check current availability, and whether the commercial model matches, with a dealer.

Frequently asked questions

How is the Glock 34 Gen5 MOS different from the G17 Gen5 MOS?

On Glock's tables, the G34 has a 135 mm barrel against 114 mm, a 207 mm slide against 186 mm and a 222 mm overall length against 202 mm. Both list 17 rounds as standard capacity, the same width and the same height with magazine.

How much heavier is the G34 Gen5 MOS than the G17 Gen5 MOS?

Glock lists 665 g without a magazine for the G34 and 625 g for the G17, and 980 g against 945 g with a loaded magazine.

Glock 34 Gen5 MOS vs G17 Gen5 MOS

At a glance

What the longer slide changes on paper

Which to pick (on paper)

Frequently asked questions

Sources

Keep exploring

At a glance

What the longer slide changes on paper

Which to pick (on paper)

Frequently asked questions

Sources

Keep exploring

The Gun Release Report