Magpul builds the PMAG 20 LR/SR GEN M3 (part no. MAG1429-BLK) as a lightweight 20-round magazine for SR25/M110-pattern rifles, chambered in .308 Winchester/7.62x51mm NATO. The reduced 20-round capacity keeps the magazine’s profile shorter than a full 25-rounder, which some shooters prefer for prone shooting positions or specific rifle builds. It’s molded in Magpul’s standard black polymer. For Magpul Industries owners running an AR-10/M110/SR25 pattern rifle, this AR magazine is a shorter-profile GEN M3 option.

Key Specifications

• Chambered in .308 Winchester/7.62x51mm NATO.
• Holds 20 rounds, a shorter-profile option than the 25-round PMAG.
• Fits AR-10/M110/SR25 pattern rifles.
• Molded in black polymer.
• Part of Magpul’s GEN M3 line.
• A detachable magazine, dropping free for fast reloads.
• Classified by the manufacturer as a Magazine.
• Weighs approximately 0.38 lb as shipped.
• Sold individually, one per package.

Frequently Asked Questions

Why choose a 20-round magazine over a 25-round PMAG? The shorter body is preferred by some shooters for prone positions or specific rifle configurations.

What rifles does it fit? AR-10/M110/SR25 pattern rifles chambered in .308 Winchester/7.62x51mm NATO.

Buy the Magpul PMAG 20 LR/SR GEN M3 Magazine, Black

A shorter-profile GEN M3 magazine in Magpul’s standard black finish, this PMAG suits prone shooting and everyday AR-10 use alike. Order it from our Lubbock, Texas gun shop for fast, insured shipping.