The PMAG 20 AR/M4 GEN M3 delivers a compact 20-round profile with the same proven feeding geometry, anti-tilt follower, and crush-resistant polymer as the rest of the GEN M3 family. Ideal when you want a shorter magazine without sacrificing reliability—built to feed smoothly, survive hard use, and perform when it matters most.
Made in the USA.
NSN: MAG560-BLK 1005-01-710-3291
Features
Constant-curve internal geometry and self-lubricating anti-tilt follower keep rounds cycling smoothly in any condition
Crush-resistant polymer body withstands impacts, drops, and pressure without cracking or splitting
Reinforced feed lips and over-insertion stop deliver reliable function across M4, M16, AR15, HK® 416/MR556, M27 IAR, and other platforms
Aggressive texturing for positive control, paint-pen panels for quick ID, and a removable floorplate for easy cleaning
Tested in extreme heat, cold, mud, and sand to guarantee performance when it matters most
RUGGED CONSTRUCTION AND ADVANCED FOLLOWER
Next-generation impact and crush resistant polymer construction
The anti-tilt, self-lubricating follower ensures a smooth feed and magazine reliability
Modified dimensions allow for wider compatibility with non Colt-spec platforms
EASY IDENTIFICATION AND ADVANCED FLOORPLATE
Utilize the paint pen dot matrix to easily identify magazines with different loadouts
Flared floorplate aids magazine handling and disassembly, and is slim enough for use with many double and triple pouches
GEN M3 DNA IN A SMALLER PACKAGE
Compact 20 round magazine accomodates firing from a prone position
Next-generation impact and crush resistant polymer construction
Its ribbed gripping surface and aggressive front and rear texture provide positive magazine handling
Constant-curve internal geometry, over-travel insertion stop on the spine, and a long-life stainless steel spring ensure smooth feeding
EXPORT NOTICE: This is an item controlled for export by the Export Administration Regulations (EAR) under the Commerce Control List (CCL). These controls take the form of export regulations and license requirements. As part of the express consideration provided for receipt of Magpul's goods, technical data and/or services, you, our customer, acknowledge that the export, re-export or other transfer, directly or indirectly, of the goods, technical data and/or services provided by Magpul in violation of U.S. law is prohibited. Customers acquiring controlled goods, technical data and/or services from Magpul shall be responsible for obtaining any necessary U.S. or other government authorization required to ensure compliance with applicable export laws. (See Magpul Compliance Notices page for more information).
PLEASE NOTE: Certain U.S. jurisdictions restrict firearm magazines sales. Magpul Industries cannot process sales/shipments prohibited by law. A list of states and municipalities restricting firearm magazine sales is available here.
WARNING: Observe safe firearm handling practices at all times. Failure to do so may result in serious bodily injury or death. Magpul Industries shall not be responsible for injury, death, or property damage resulting from faulty installation, misuse, illegal use, or modification of this product.
Technical Specifications
More Information
Collection
2026 NEW Colors
Caliber
5.56x45mm / .223 Remington
Platform
AR15, M4, M16, SA-80
Capacity
20 rounds
Weight
4 oz.
Length, max
5.6 in.
Compatibility
Wide compatibility with most 'STANAG 4179' platforms such as the AR15, M4, M16, SCAR MK16/16S, HK416, MR556, M27 IAR, IWI Tavor, and others