NoNe Airsoft takes a look at a custom-built airsoft Tokyo Marui Hi-Capa 4.3 Xtreme Semi pistol, which was assembled from individual parts. While the pistol maintains a largely stock external look, it is internally optimized for high performance using 12kg Green Gas. The builder notes that the goal was to upgrade every potential problem area for long-term reliability.

The extensive internal modifications include a hard-to-find Marui Full Auto Xtreme 4.3 slide, an M.Lead inner barrel, and a Savier brass hop-up chamber. The firing group features an AM hammer set and a CNC aluminum trigger. These components result in an exceptionally loud and crisp cycling sound, which the presenter humorously describes as "annoyingly loud."

The upgraded pistol is compliant with field regulations, shooting a stable 390-395 FPS with 0.25g BBs, which the presenter uses for improved accuracy. A live-fire demonstration showcases the gun's heavy and fast recoil, and the video concludes by highlighting a final reliability upgrade: a CowCow aluminum magazine catch to address a common breakage point.