Magnetic Locking NPAS aluminum loading nozzle set for WE M4

Including an aluminum loading nozzle, three nozzle tips, steel nozzle guide set and a tool. 7075 CNC aluminum made Compatible with WE M4 M16 416 888 T91 AR GBB This is a new version of RA-TECH patented Negative Pressure Adjustable System (a.k.a. NPAS) for WE AR series GBB. ​ The loading nozzle is still made of 7075 CNC aluminum material adding with the new design of magnetic locking and exchangeable nozzle tip system. ​ The magnetic locking system can stable the flute valve position and avoid the muzzle velocity dropping during vibration. ​ Players can install different nozzle tips to get suitable muzzle velocity for different fields/games requirements. Muzzle velocity data range tested with WE M4 GBB (inner barrel 370mm)/0.2g bb/green gas: Red tip 0-145 m/s (approx. 475 fps) Blue tip 0-125 m/s (approx. 410 fps) Green tip 0-95 m/s (approx. 312 fps) Recommended with Maple Leaf hop up buckings for better performance.