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Semi-auto pistols

Glock 21

Glock 21 — documented specs for the G21 Gen5 MOS: caliber .45 ACP, barrel length 117 mm (4.61 in), overall length 205 mm (8.07 in), weight 825 g (29.1 oz), capacity 13. The source for each figure is listed below the specs (catalog as of 10/16/2026).

Category
Semi-auto pistols
Classification (DE)
Short firearm
Designed
1991
Origin
Austria
Calibers
.45 ACP

Derived from design and catalog dimensions under the German WaffG, Annex 1 Sec. 1 Subsec. 1 No. 2.5; the individual gun is what counts.

Specifications

Action
Short recoil
Sights
Open sights
Barrel length
117 mm (4.61 in) · G21 Gen5 MOS
Overall length
205 mm (8.07 in) · G21 Gen5 MOS
Weight
825 g (29.1 oz) · G21 Gen5 MOS
Capacity
13 · G21 Gen5 MOSstandard magazine

Sources

Specifications come from the source cited alongside them; counts are based on our catalog as of the date stated. Not legal advice: what follows from these figures in a given country is decided by that country’s law. Waffenschrank is not affiliated with the manufacturers named.

Magazines that fit

Magazines that fit this model according to their manufacturer — with capacity, caliber and the limits by country in the accessories catalog.

United States (federal law): Federal law sets no capacity limit for magazines; the former limit expired in 2004 and has been repealed (18 U.S.C. § 922(w) (repealed)). Several states do limit capacity, however – for example California, New York, Connecticut, Maryland, Washington and Colorado – some as a sales ban, some as a possession ban. This list is not complete; the law of the state decides.

Other models in .45 ACP

Models from other manufacturers in the same caliber, drawn from the catalog in no particular order — not a recommendation and not a comparison of specs.

Related

Catalog as of