Magpul PMAG GEN M3 40rd .223/5.56 Black Magazine

Magpul PMAG GEN M3 40rd Magazine is a 40-round polymer rifle magazine for .223 Rem / 5.56 NATO that feeds ammunition for compatible AR-15/M4 platforms. It provides high-capacity cartridge storage and spring-fed feeding for semi-automatic rifles.

The primary purpose of this PMAG is to offer reliable cartridge feeding and enhanced handling for AR-15/M4 pattern rifles and similar platforms. It is intended for use as a replacement or spare magazine for range, training, and other lawful shooting applications where a 40-round capacity is required. The GEN M3 design emphasizes feeding geometry, spring life, and handling improvements for repeatable performance.

• 40-round capacity for .223 Rem / 5.56 NATO (specified caliber/cartridge)
• Polymer construction in black finish for a durable, lightweight body
• Long-life stainless steel spring to maintain consistent follower pressure
• Four-way anti-tilt follower and constant-curve internal geometry for reliable feeding
• Tool-less disassembly for simple field cleaning and maintenance
• Redesigned bolt catch notch and over-travel stop to improve compatibility and prevent over-insertion on compatible weapons
• Low-profile ribs with aggressive front and rear texture for positive control in varied conditions
• Flared, easy-to-disassemble floorplate with improved drop protection and a paint-pen dot matrix on the bottom panel for user marking

Specifications & Construction

Materials and construction: Polymer body with a stainless steel spring and a polymer follower. Finish: black. Capacity: 40 rounds (as specified).

Dimensions / weight: not provided by the supplied data.

Operating method: spring-driven follower provides cartridge feed to the rifle action; tool-less disassembly enables field maintenance.

Durability notes: material and manufacturing updates in the GEN M3 are described as intended to enhance strength, durability, and reliability. Made in the USA.

Compatibility & Intended Use

Designed to fit AR-15/M4 compatible rifles. The GEN M3 is optimized for Colt-spec AR-15/M4 platforms and the supplied information also lists compatibility with HK 416/MR556A1/M27 IAR, British SA-80, and FN SCAR MK 16/16S, among others. Typical uses include range and training applications, duty or patrol rifle configurations, and other lawful uses where a 40-round AR-15 compatible magazine is appropriate. It is suitable as a primary magazine or a spare in standard magazine pouches.