Gearbox version II is completly milled at CNC machining center. Compared to other aluminium gearboxes, our is made out of solib block of aluminium AW EN7075 T651.It is not casted like Chinese ones! Our gearbox is tested wit M160 spring without any signs off wear or breaking long term. Gearbox's surface is decoratively anodized.

It's available with slots for 8mm. Bearings are not included.

Gearbox is equipped with quick spring change system - QSC. Our CNC spring guide is included.

All standard parts for gearbox version II can be used of course. Both halves fit together with absolute precision including bearing holes,
which are 100% co-axial.

Further small features:

• accurate hole for Anti-Reversal Latch - it doesn't fall out
• accurate hole for trigger - it doesn't jump out even with strong spring
• micro grooves on pins, which hold trigger trolley spring a tappet plate spring - springs don't jump out

Package includes 1 x gearbox version II, 2 x screw M2.5 x 3, strength screws, CNC spring guide and Retro ARMS sticker.

We try to adjust our gearboxes as much as possible to allow use of the widest variety of part brands. However we still recommend to use Retro ARMS spare parts, because they are the most compatible.

Gearbox installation requires technical knowledge and skills.

in variable color depending on availability (example black or metal color)