MM S400 Pump Grip

The MM S400 Pump Grip changes how priming the S400 actually feels in hand, moving away from the blaster's standard grip toward a pump-style grip section that a lot of players find more natural to rack repeatedly through a game. It's an ergonomics-first upgrade rather than a performance part — the priming mechanism itself isn't altered, but how comfortably you interact with it is.

Compared to the standard grips readily available for the S400, this set is built specifically around comfort during repeated priming, which matters if you're doing a lot of cycling over a long session. It bolts onto the S400 in place of the stock grip and is a Black-only release, so there's a single consistent colourway to match against the rest of your S400 build.