Bolt Carrier Guide Bushing, V2, Fusion Engine Poppet Valves A more precise measurement (which

A more precise measurement (which accounts for the hopup and bucking in use) may be obtained by installing a nozzle into the system which is slightly too long for the replica and measuring the nozzle setback when placed into the hopup

Dent in Cylinder

With the Red Low Flow poppet installed along with one of these higher flow nozzles

This manifold is used with all current production V2

(PolarStar Filter Fitting now included)

Bolt Carrier Guide Bushing, V2, Fusion Engine Poppet Valves A more precise measurement (whichThe V2 Fusion Engine will come with Bolt Carrier Guide Bushing attached to the top of the front cylinder section. It is mainly used to prevent the mock bolt carrier from impacting the hop up adjustment wheel on certain models of M4's. This is an OEM replacement in the event yours gets taken by the workbench gremlins. The 8 32 screw which secures the bushing to the cylinder comes as part of the Fusion Engine Screw Set.