Gearbox divided V2 (8mm) QSC (CNC, maximum load, material EN AW 7075 T6, 8mm bearings) - RetroArms

CNC made split gearbox V2 is designed for airsoft weapons type AR15 (M4), M16, made of the block of the strongest aircraft duralumin EN AW 7075 T651, which has higher tensile strength (590MPa) than ordinary structural steel (390MPa). Thanks to the material used, the gearbox has several times longer service life than a conventional zinc gearbox.

A divided gearbox means that the gearbox is divided into two parts, Upper and Lower. A split gearbox has several advantages. It is especially easy to install internal parts in the gearbox. When tuning the airflow, the lower part of the gearbox is installed in the weapon and only the upper part, which is held on a pin, is removed, so it is not necessary to assemble and disassemble almost the entire weapon. This split gearbox can be installed in a very curved AR15 (M4) body in combination with any AR15 (M4) Hop-Up chamber. The recommended nozzle length is 21.4 mm. However, the length of the nozzle can be affected by other factors, in particular the angle of inclination of the feeder arm or the Hop-Up rubber neck of different lengths, where in rare cases it may be necessary to use a nozzle with a different length.

Package contains:

• CNC split gearbox V2 (8mm)
• set of screws
• QSC spring guide

The gearbox has a quick QSC spring change, thanks to which the spring can be pulled out by simply turning the Allen key with the spring mandrel, without the need to disassemble the whole gearbox. With this solution it is necessary to secure the spring guide with a screw, for AR15 (M4) weapons it is done by tightening the stock screw, or for weapons that have a folding stock, for example, it is necessary to secure the spring guide with a QSC screw. Otherwise, there may be a situation where the spring conductor gets stuck in the spring. This is due to the quick replacement of the spring, the spring guide is not fixed in the gearbox, but so that it can be pulled out by turning the key. The space for trigger contacts is adapted so that it is possible to install and use common trigger contacts and processor units from commonly available manufacturers such as Gate, etc.

The CNC divided gearbox V2 has a surface treatment with protective anodizing, because thanks to the properties of duralumin EN AW 7075 T651 it is practically non-anodizable, due to its high hardness and strength compared to normally anodizable aluminium, ordinary anodizing does not penetrate into the material. If this dural is not protected by a surface treatment, there is a high risk of corrosion of aluminium (large grey spots, sometimes with a mouldy appearance).

The CNC gearbox can be installed in airsoft weapons in the Tokyo Marui compatible standard. This also applies to internal parts. Never use brute force when installing internal parts or the gearbox itself. When tightening the screws, use a tightening torque of max. 1Nm, otherwise the wrench will turn in the screw head. It is not necessary to tighten the screws "on blood" if you want to be sure that the screws will not loosen, use optional thread glue or paint. Any spring can be installed in the CNC gearbox, but it is necessary to realize that the stronger the spring, the lower the life of the gearbox.

Installing internal parts in a gearbox as well as a gearbox in a weapon requires expertise, experience and skill. Thanks to a large number of different manufacturers of airsoft weapons, where each manufacturer "invents" its dimensions and there are no standards in airsoft as we know common from mechanical engineering such as ISO, etc., one type of weapon from several manufacturers can be completely different in size. by making internal parts or a mechanism. Therefore, we recommend weapon manufacturers who state Tokyo Marui compatible, where there should be no problem with the compatibility of the CNC gearbox.