The RetroArms 8mm version 3 CNC gearbox is made from highly durable Dural EN AW 7075 T651 aircraft-grade aluminum, which offers superior mechanical strength compared to traditional structural steel. The selected manufacturing materials make the Retro Arms gearbox an unparalleled alternative to conventional zinc alloy gearboxes.
Quick Spring Change
All Retro Arms CNC gearboxes feature a quick spring change system. This allows the spring to be replaced without disassembling the gearbox, through an opening at the rear. The spring can be changed by gently pressing the spring guide inward and turning it using a hex key.
Features:
- QCS quick spring change from the rear of the gearbox
- Grooved spring retainers to help keep tappet plate and switch springs in place
- AOE (Angle of Engagement) inspection port
- Bearing seats are 0.02mm smaller than the nominal bearing size (7.98mm) to prevent movement inside the seat. Seat edges are chamfered for easier installation.
- Gearbox shells are aligned with each other using CNC-milled grooves and edges
- Anti-reverse latch release hole for releasing tension before disassembly
Package Includes
- Gearbox
- Spring guide
- Screws
Note! Do not use MAXX MODEL cylinder heads or similar parts with Retro Arms CNC gearboxes if they do not transfer impact to the front edge of the gearbox. The pins designed to keep the cylinder head in position should not absorb the piston impact. Using an incompatible cylinder head will damage the gearbox.
Installing internal parts requires experience and skill. There are many airsoft manufacturers on the market, each with their own standards. For this reason, when using parts from different manufacturers, some fitting may be required. We recommend using only parts that are directly Tokyo Marui compatible to avoid compatibility issues.
