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. Product 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 Product Specifications Manufacturer: Magpul Model: PMAG Caliber: 5.56x45mm - 223 Rem Magazine Capacity: 20 Rounds Additional Features: Wide compatibility with most STANAG 4179 platforms such as the AR15, M4, M16, SCAR MK16/16S, HK416, MR556, M27 IAR, IWI Tavor, and others