
Availability: In Stock
The Magpul PMAG 20 AR/M4 Gen M3 5.56 is a modern polymer rifle magazine built for AR-15 and M4 platforms firing 5.56 NATO or .223 Remington. This 20-round capacity magazine combines next-generation materials with proven Magpul engineering to deliver reliable feeding and durability in the field, whether you're running drills at the range, hunting from a prone position, or maintaining a ready carbine for home defense. The Gen M3 design incorporates lessons learned from countless hours of real-world use, resulting in a magazine that handles hard service without compromise.
What sets the Gen M3 apart is its attention to the details that matter in actual use. The constant-curve internal geometry works with a four-way anti-tilt, self-lubricating follower to ensure smooth, reliable feeding shot after shot. A long-life stainless steel spring resists corrosion and maintains consistent pressure over time. The impact- and crush-resistant polymer body shrugs off the abuse that comes with field use—dropped on rocks, dragged through dirt, or packed tight in a range bag. The flared floorplate makes reloading and disassembly easier and sits low enough to work with double and triple mag pouches without interference.
The ODG (Olive Drab Green) finish with gray follower is practical and time-tested. Aggressive texturing on the front and rear surfaces gives you positive purchase whether you're working the magazine in or out of the gun, even in wet conditions or gloved. An over-travel insertion stop on the spine prevents the mag from being fully inserted past the point where it seats properly. At 3.6 inches long and 3 ounces, the 20-round capacity balances firepower with ergonomics, making it compact enough for prone shooting without sacrificing rounds downrange.
Thanks to its wide STANAG 4179 compatibility, the Gen M3 works not only with AR-15 and M4 platforms but also with HK416, SCAR variants, IWI Tavor, and other modern rifles built to that standard—though you'll want to verify fit with your specific platform. Each magazine ships as a complete, ready-to-use unit in a sealed bag.
| Capacity | 20 rounds |
| Caliber | 5.56x45mm NATO / .223 Remington |
| Platform Compatibility | AR-15, M4, M16, SA-80, and other STANAG 4179–compatible platforms (HK416, SCAR MK16/16S, MR556, M27 IAR, IWI Tavor, and others) |
| Color | ODG (Olive Drab Green) with gray anti-tilt follower |
| Length | 3.6 inches |
| Weight | 3 ounces |
| Contents | 1 complete magazine |
Yes. The Gen M3 is designed for AR-15 and M4 platforms chambered in 5.56 NATO or .223 Remington, and its modified dimensions provide wide compatibility with most STANAG 4179–compliant platforms. If you're using a non-standard or proprietary receiver, verify fit before purchasing.
The Gen M3 works with a broad range of STANAG 4179–compatible rifles, including HK416, SCAR MK16/16S, MR556, M27 IAR, IWI Tavor, SA-80, and M16. Always confirm compatibility with your specific firearm.
The flared floorplate is designed to be slim enough for use with double and triple mag pouches, so it should work well with most standard magazine carriers.
No. The magazine does not include a dust cover; you would need to purchase one separately if desired.

SKU: 200189109





Availability: In Stock
The Magpul PMAG 20 AR/M4 Gen M3 5.56 is a modern polymer rifle magazine built for AR-15 and M4 platforms firing 5.56 NATO or .223 Remington. This 20-round capacity magazine combines next-generation materials with proven Magpul engineering to deliver reliable feeding and durability in the field, whether you're running drills at the range, hunting from a prone position, or maintaining a ready carbine for home defense. The Gen M3 design incorporates lessons learned from countless hours of real-world use, resulting in a magazine that handles hard service without compromise.
What sets the Gen M3 apart is its attention to the details that matter in actual use. The constant-curve internal geometry works with a four-way anti-tilt, self-lubricating follower to ensure smooth, reliable feeding shot after shot. A long-life stainless steel spring resists corrosion and maintains consistent pressure over time. The impact- and crush-resistant polymer body shrugs off the abuse that comes with field use—dropped on rocks, dragged through dirt, or packed tight in a range bag. The flared floorplate makes reloading and disassembly easier and sits low enough to work with double and triple mag pouches without interference.
The ODG (Olive Drab Green) finish with gray follower is practical and time-tested. Aggressive texturing on the front and rear surfaces gives you positive purchase whether you're working the magazine in or out of the gun, even in wet conditions or gloved. An over-travel insertion stop on the spine prevents the mag from being fully inserted past the point where it seats properly. At 3.6 inches long and 3 ounces, the 20-round capacity balances firepower with ergonomics, making it compact enough for prone shooting without sacrificing rounds downrange.
Thanks to its wide STANAG 4179 compatibility, the Gen M3 works not only with AR-15 and M4 platforms but also with HK416, SCAR variants, IWI Tavor, and other modern rifles built to that standard—though you'll want to verify fit with your specific platform. Each magazine ships as a complete, ready-to-use unit in a sealed bag.
| Capacity | 20 rounds |
| Caliber | 5.56x45mm NATO / .223 Remington |
| Platform Compatibility | AR-15, M4, M16, SA-80, and other STANAG 4179–compatible platforms (HK416, SCAR MK16/16S, MR556, M27 IAR, IWI Tavor, and others) |
| Color | ODG (Olive Drab Green) with gray anti-tilt follower |
| Length | 3.6 inches |
| Weight | 3 ounces |
| Contents | 1 complete magazine |
Yes. The Gen M3 is designed for AR-15 and M4 platforms chambered in 5.56 NATO or .223 Remington, and its modified dimensions provide wide compatibility with most STANAG 4179–compliant platforms. If you're using a non-standard or proprietary receiver, verify fit before purchasing.
The Gen M3 works with a broad range of STANAG 4179–compatible rifles, including HK416, SCAR MK16/16S, MR556, M27 IAR, IWI Tavor, SA-80, and M16. Always confirm compatibility with your specific firearm.
The flared floorplate is designed to be slim enough for use with double and triple mag pouches, so it should work well with most standard magazine carriers.
No. The magazine does not include a dust cover; you would need to purchase one separately if desired.
SKU: 200189109
