Z-Parts MK4 M-Lok 13 inch Rail for Tokyo Marui M4 MWS GBB Airsoft Rifle (w/ Barrel Nut/ DDC)

Z-Parts MK4 M-Lok 13 inch Rail for Tokyo Marui M4 MWS GBB Airsoft Rifle (w/ Barrel Nut/ DDC) Robust High-quality Metal Construction Airsoft Handguard M-LOK Sections for Modern Accessories 20mm Picatinny Rail on Top Suitable For Tokyo Marui MWS M4 Series Gas Blow Back GBB Airsoft Rifle