



This is Rrtro Arms Gearbox version II. It is completely milled at their CNC machining center in the Czech Republic. Compared to other aluminium gearboxes, theirs is made out of a solid block of aluminium AW EN7075 T651. Source block weighs 1550g and only 143g of the material remains. It is not casted like Chinese ones! Retro Arm's gearbox is tested with a M160 spring without any signs off wear or breaking long term and the gearbox's surface is decoratively anodized. It's available with slots for 8mm or 9mm bearings. This model is designed for use for 8mm.
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