Magpul PMAG 40 AR/M4 GEN M3 5.56 NATO Magazine

The Magpul PMAG 40 AR/M4 GEN M3 is a 40-round polymer magazine designed for AR-15/M4-compatible platforms chambered in .223 Remington/5.56 NATO. Made in the USA, it features a stainless steel spring, anti-tilt follower, constant-curve internal geometry, and tool-less disassembly for cleaning.

The GEN M3 design includes a redesigned bolt catch notch, an over-travel stop, textured surfaces for positive handling, and a paint pen dot matrix for identification. Its flared floorplate supports extraction, handling, and drop protection while remaining compatible with tight double and triple magazine pouches. The magazine is also listed as compatible with the HK 416, MR556A1, M27 IAR, British SA-80, and FN SCAR MK 16/16S.

Key Specifications

• The magazine holds 40 rounds.
• It is chambered for .223 Remington/5.56 NATO ammunition.
• The magazine is constructed from polymer.
• It has a black finish and color.
• The magazine is designed to fit AR-15/M4-compatible platforms.
• The magazine includes a stainless steel spring.
• The follower uses a four-way anti-tilt design.
• The magazine features tool-less disassembly for cleaning.
• The package contains one magazine.
• It is made in the USA.

With its 40-round capacity, durable polymer construction, identification matrix, and serviceable GEN M3 feature set, the PMAG 40 AR/M4 offers a practical magazine option for compatible .223 Remington/5.56 NATO platforms.