Guns Modify EVO 35 Round MWS M4 GBBR Gas Magazine (V4)

The Tokyo Marui MWS is the benchmark M4 GBBR, and its one consistent weak point is magazine cost and weight — carrying four or five OEM mags is heavy and expensive. The Guns Modify EVO is the established aftermarket answer: a magazine engineered specifically for the MWS that cuts weight while matching or improving on OEM gas performance.

The V4 revision is the current generation, with reworked internal seals and a refined valve that improves gas efficiency and cold-weather consistency over earlier EVO versions. The result is a magazine that delivers its full 35-round capacity on a single gas fill in typical conditions, with consistent velocity from the first round to the last.

Weight reduction is the headline. The EVO shell uses a lighter construction than the OEM Marui magazine, which adds up significantly across a full loadout — four EVO mags noticeably lighten a rig compared to four OEM mags, without sacrificing the drop-resistance a skirmish mag needs.

Compatible specifically with the Tokyo Marui MWS system and the rifles built on it. Not compatible with VFC or other GBBR magazine patterns — this is an MWS-platform magazine. Verify your rifle is MWS-pattern before buying.

Specifications