Maruyama MP9 Rotor Preorder -Includes all hardware needed to

-Includes all hardware needed to install: npas housing

Modification required for install

the ambi catch sits more properly

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I would encourage you to complete this piston by buying Bavtechs Brass piston to complete this

Maruyama MP9 Rotor Preorder -Includes all hardware needed toThe Maruyama MP9 is known to have issues with the hammer cam after a few thousand rounds of cycling. This rotor is a replacement for that cam that will increase reliability. Modification is required of the hammer to install the rotor. Heat treated 17 4 stainless steel Increases reliability Modification required for install