Airtech Studios TDC Trolley w/ M-nub for Tokyo Marui SCAR H / HK417 (R-Hop & Flat Hop)

Airtech Studios TDC Trolley w/ M-nub for Tokyo Marui SCAR H / HK417 (R-Hop & Flat Hop) The Airtech Studios TDC Trolley w/M-nub are designed to be used in Tokyo Marui NGRS SCAR H & 417 Series hop-up chambers. Instructions with pictures are available with this product, making installation much easier for those who wish to have a R-hop build. Suitable For Tokyo Marui NGRS (Next Generation Recoil Shock) SCAR-H/ HK417 Series Electric Gun AEG Rifle Airsoft Guns