RetroArms Reinforced CNC QSC Gearbox - HK417

High-quality and durable CNC machined reinforced gear box for VFC / UMAREX HK417 electric guns manufactured by RetroArms. The gear box has a QSC quick spring change feature. The gear box fits 8mm bearings. Material: 7075 T651 aircraft aluminum. In addition to the gear box, the package includes a screw set and a bearing-mounted QSC spring guide.