Apex walks us through the upgrade of a Tokyo Marui Hi-Capa GBB Pistol using Nexxspeed parts. He unboxes and prepares to install a fresh CNC aluminum blowback unit (BBU), a matching aluminum nozzle, and a 180% nozzle spring. The aluminum construction is highlighted as a durable fix for a component that shouldn't break, though the installation gets off to a slightly chaotic start when the presenter realizes the parts are thirsty for some much-needed lubrication.

Despite some mild fumbling and a brief moment of trying to remember the exact assembly steps, the pieces come together successfully. Apex notes that this updated version fixes a previous issue where the nozzle wouldn't return properly. After a bit of manual testing to confirm that the slide and nozzle are snapping back smoothly, the complete pistol build is ready for action.

The final portion of the video transitions straight to the airsoft field for some real-world testing. The newly upgraded Hi-Capa is put through its paces in close-quarters combat, where it proves to be quite functional. Apex manages to secure several clean hits on opponents, proving that the unorthodox installation process was worth the effort.