Gearbox Shell V2 QSC Retro ARMS

Gearbox Shell V2 QSC Retro ARMS (Quick Spring Change) is part of the "7075" gearbox series from Retro ARMS.

The gearbox is entirely made at high precision CNC machines. Compared to other aluminum gearboxes, Retro ARMS products are made of a solid block of aircraft aluminum (Dural) AW EN7075 T651 to enhance durability and corrosion resistance.

This type of aluminum is used predominantly in the aircraft parts industry, rockets, components such as valves, gears, fuses, but also for bicycle frames and terrain vehicles, because has higher strength (590MPa), than common construction steel (390MPa).

Therefore, an aluminium block of 1550 g molded at CNC machines turns into a gearbox shell of only 143 g.
The strength and durability of the material used in manufacturing these gearboxes has been tested with M160 springs without any signs of wear.

The gearbox is suitable for 8 mm bearings, the bearings are not included in the package.
Another advantage of these gearboxes is the QSC, Quick Spring Change system,that allows the user to change the spring without opening the gearbox.

Material: EN AW 7075 Aluminum

The package includes: V2 gearbox, screws and spring guide made at CNC machines.

Gearbox features:
- The size and wall thickness is suitable for all M4 airsoft rifles.
- The cylinder head attachment hole is suitable for all types of cylinder heads, not just for Retro ARMS.
- Side holes that air circulation.
- Control hole for AOE.
- Control hole to check the piston position.
- The gearbox can also be installed on non-standard rifles.
- Holes for lubricating the gears.
- Added hole for releasing anti-reverse latch.
- Holes for cylindrical screws + new resistance screws.
- Holes for cables situated under the motor.
- More rounded edges made at the CNC machines.
- Compatible with ASCU mosfets.
- The front of the gearbox has been adjusted to be compatible with several types of Hop-up chambers.
- Precise hole for the trigger, so that it does not jump if strong springs are used.

Retro ARMS company offers a lifetime warranty against breaking/cracking, but this is not valid if the gearboxes are used with inappropriate internal components.
The Retro Arms Gearboxes are 100% compatible with Retro Arms internal components, but also with other manufactures. Using only Retro Arms products you get performance and resistance in time, features for which the company is recognized.

We do not recommend using Retro ARMS gearboxes on airsoft Classic Army rifles due to compatibility issues.