Bolt Carrier Guide Bushing, V2, Fusion Engine Poppet Valves Dent in Cylinder

Dent in Cylinder

Most stock hop up units have loose fitment in the outer barrel

(PolarStar Filter Fitting now included)

It’s not rocket science

M5 Buffer tube screw 1x #23 HSS Drill Bit Grip screw pilot holes 1x Compression Spring Pusher piece — keeps engine seated forward 2x Bullet Valve Lead

Bolt Carrier Guide Bushing, V2, Fusion Engine Poppet Valves Dent in CylinderThe 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.