Where The Power Actually Comes From
Everyone upgrades the spring when they want more out of a gun, and a lot of the time the spring was not the problem. The piston head is what seals the piston against the cylinder wall, and if that seal leaks then a stronger spring just wastes more air. Air seal is where consistency and efficiency live.
Why Brass
A brass piston head is heavier and harder wearing than a plastic one. The extra mass at the front of the piston helps it carry through the stroke, and brass will not deform under repeated impact the way a moulded head eventually does. On a gun that is being taken past stock power, it is one of the sensible places to spend money.
What We Are Not Claiming
Rocket do not publish the bearing count, port count or o-ring specification for this head, so we are not listing them. What we can tell you is that it is brass, it is from their Next Generation line and it is for M4 pattern gearboxes.
A Word On Upgrades
Changing a piston head means opening the gearbox, and it is rarely worth doing on its own. If the box is coming apart anyway, that is the moment to do the seal properly: head, o-ring, cylinder and nozzle together. Our Kent workshop does this work daily and will tell you honestly whether it is worth it on your gun.
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