Mecanica 6mm gives an overview of internal replacement and upgrade parts released by Rossi for its airsoft equipment lines, specifically targeting the Rossi DEVGRU model. He points out the various components now available in the market, including reinforced Version 2 gearboxes, electronic trigger plates designed to eliminate semi-automatic delay, and high-performance "Plus line" parts such as pistons with metal teeth and aluminum nozzles. The focus is on providing maintenance options and performance enhancements for older equipment versions.

A practical demonstration is conducted where an older Rossi Devgru unit, which initially exhibits a trigger delay, undergoes a series of internal upgrades. The tech guy replaces the original gearbox with a new structurally reinforced Version 2 shell and installs an aPlus line electronic trigger board. The process includes technical steps such as shim adjustment, cleaning, and specific re-lubrication of the internal sets. Mecanica 6mm also notes that because the parts come from the same manufacturer, they maintain high compatibility, though external wiring was reinforced with heat-shrink tubing for added protection.

Following the modifications, the equipment shows an immediate change in trigger response and a lack of firing delay in semi-automatic mode. He ends by noting that while these Rossi parts are designed for their own platforms, they can be adapted for use in airsoft models from other manufacturers, provided the technician has the necessary tools for potential fitting adjustments.