Firearms

Glock G21 MOS Gen4 .45 ACP 4.61-inch

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Specifications

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Notable Variants

Aftermarket Ecosystem

Historically Significant Examples

Serial Number Data

Production data from factory records and collector research. Year ranges are approximate for pre-1968 firearms.

Years	Serial Range	Count	Factory	Country	Confidence

Gen4 G21 with Modular Optic System cut. Full-size .45 ACP with factory optics mounting capability.

Type: Pistol

Action: Semi-Automatic

Caliber: .45 ACP

Capacity: 13

Year introduced: 2015, Austria

Weight: 29.28 oz

Overall length: 8.22"

Status: Active

Intended use: Service, Defense, Optics-Ready