Z-Parts MK16 M LOK 9.3 inch Rail for Systema PTW M4 Series (w/ Barrel Nut)

Z-Parts MK16 M LOK 9.3 inch Rail for Systema PTW M4 Series (w/ Barrel Nut) Metal Construction Mo-Lok System Handguard 20mm Picatinny Rail System Top Rail Suitable For Systema M4 PTW Series Airsoft Rifle Airsoft Guns