- Product Code: MAG661-BLK
- EAN: 840815109709
Magpul PMAG 21 GL9 - Glock is a 21-round pistol magazine for double-stack 9 mm Glock pistols. It meets the 140 mm overall length requirements for competition magazines and provides additional capacity without separate magazine extensions.
The magazine’s all-polymer construction is lightweight, rigid, and designed to withstand thousands of use cycles. A highly visible, anti-tilt follower supports reliable operation, while the long-life stainless steel spring resists corrosion.
Witness windows on both sides of the magazine show the remaining capacity at 10, 15, and 21 rounds. The enlarged, ribbed base plate improves grip, while the easy-to-remove design makes magazine cleaning and maintenance easier.
A dot matrix on the body for paint pen markings helps identify different loads. The magazine drops free from the firearm both loaded and empty. It fits full-size, compact, and subcompact double-stack 9 mm Glock pistols, but extends below the grip of smaller models.
Magpul PMAG 21 GL9 - Glock - Features:
- Product type: pistol magazine
- Capacity: 21 rounds
- Caliber: 9 mm
- Compatibility: full-size, compact, and subcompact double-stack 9 mm Glock pistols
- Overall length class: meets 140 mm competition magazine overall length requirements
- Body material: durable, lightweight, and highly rigid polymer
- Follower: highly visible anti-tilt design
- Spring: long-life, corrosion-resistant stainless steel
- Capacity check: witness windows on both sides at 10, 15, and 21 rounds
- Base plate: enlarged, ribbed, and easy to remove
- Serviceability: the base plate can be removed for efficient cleaning
- Marking option: paint pen dot matrix for identifying different loads
- Magazine release: drops free both loaded and empty
- Color: black
- Country of manufacture: United States
Reliable construction and 21-round capacity make this magazine a practical option for compatible Glock pistols. Witness windows, a clear follower, marking area, and removable base plate make use, identification, and maintenance easier.
Recommended use: suitable for training and competition use with compatible double-stack 9 mm Glock pistols when additional capacity and an easy-to-maintain design are needed.
Product description updated 3 September 2026.
