Hop Up Barrel Slot Bushing set Fittings This FCU is also universally

This FCU is also universally compatible with all PolarStar HPA systems including both dual and single-solenoid systems

The V2 Fusion Engine will come with Bolt Carrier Guide Bushing attached to the top of the front cylinder section

lightweight poppet valve design yet still operates on the same principle as the Fusion Engine™ poppet

they can also be threaded into a conventional regulator to make an extremely compact air rig

Hop Up Barrel Slot Bushing set Fittings This FCU is also universallyHop Up Thing Barrel Slot Bushings Stop the wiggle. Lock the hop up in place. Most stock hop up units have loose fitment in the outer barrel, leaving room for the hop up to rotate or shift vertically. Rotation sends BBs left or right. Vertical movement throws off loading consistency and nozzle alignment. Either way, your accuracy pays the price. Barrel slot bushings eliminate that play entirely. They fill the gap between the barrel slots and the Hop Up