The Magpul PMAG 20 LR/SR GEN M3 sets the standard for .308 Winchester and 7.62 NATO AR-10 rifles. Engineered with precision and built from impact-resistant polymer, this 20-round mag is lightweight, durable, and combat-proven.


Its next-gen internal geometry and anti-tilt, self-lubricating follower ensure flawless feeding even under stress. The slim 20-round design makes it easier to shoot prone, store, and carry while still giving you the capacity needed for range or duty use.


Key Features:


20-round capacity (.308 Win / 7.62 NATO)


Compatible with AR-10, SR-25, M110, and similar LR/SR platforms


Impact- and crush-resistant polymer body


Textured gripping surface for positive handling


Anti-tilt, low-friction follower for reliable feeding


Long-life stainless-steel spring resists corrosion


GEN M3 design – optimized strength and performance


⚠️ Note: Not compatible with Armalite AR-10B rifles or other non-standard .308 platforms.