- Completely Custom USA Machined and Designed Nozzle - Same or better FPS over existing Bored out Red+ Nozzles - 20% Larger Bore than current standard Red Nozzles - Constructed from 6061 T6 Aluminum - Compatible with all generations of the V2 PolarStar Fusion Engines (Designed for M4 nozzle based setups) - Offers better hop up seal for better performance and feeding - Fixes issues previous drilled red+ nozzles had of not sealing properly against bucking or not seating the BB properly against the hop nub during firing - Produced in the USA - Oh and of course they are Purple!