Krytac M4 -AR15 Nautilus 8mm V2 GearBox by Krytac CHFS excellent accuracy and range

excellent accuracy and range

Stock screws for upper receiver and trigger guard

per soddisfare alle specifiche militari

Enables the mounting of optics

2" long stock is made of durable aluminium and is M-LOK and RIS compatible

Krytac M4 -AR15 Nautilus 8mm V2 GearBox by Krytac CHFS excellent accuracy and rangeKrytac Nautilus reinforced gearbox shell. One of the highest quality shells currently on the market and this drop in replacement is perfect for building a custom gearbox or replacing a damaged shell. The corners of the gearbox that surround the cylinder feature a smooth radius, as opposed to a 90 angle, to prevent fracture. Also, the gearbox shell features a small window on the left side where lubrication can be applied directly to the gears or