8MM CNC REINFORCED GEARBOX FOR HK417 QD RETRO ARMS (RTAR-6686)

New model machined from solid of the highest quality and durability
ideal for super powerful springs or intensive use with super gusts
unlike other printed models, it is produced with milling and retified and polished finish with CNC machines
thanks to the particular washing it combines incredible strength with negligible weight (50% less than the printed model)
threaded mounting screws and quick release spring holder included
compatible with 417 Umarex / Vfc models