RA-TECH - NPAS Upgrade Set for WA M4 GBBR

RA-TECH N.P.A.S upgrade set
Essential part for your Airsoft Gas Blow Back Rifle
Design For NPAS (Negative Pressure Air System)
Compatible with all RA-TECH nozzle
Metal Construction
Suitable for Western Arms WA M4 Series Airsoft GBB Rifle