Dr. Gearbox Custom Tokyo Marui Monochrome "ZERO" 5.1 Hi-Capa GBB Airsoft Pistol, Silver/Black

Built for competitive speedshooting, the silver and black Dr. Gearbox Custom Tokyo Marui Monochrome "ZERO" 5.1 Hi-Capa GBB Airsoft Pistol delivers sharp looks alongside a lightweight, fast-cycling platform. The upper slide, outer barrel, trigger, and grip frame are made of polymer while anchoring the internal firing components to a metal lower receiver rail. Running on green gas (12KG gas recommended), the semi-automatic system delivers 300 to 320 FPS alongside dial-adjusted hop-up trajectory control.

Feeding from a 31-round gas magazine, the complete set includes the monochrome airsoft pistol, a 31-round gas magazine, and a user manual, with a 15–20 day production lead time. Because this model utilizes gold-standard Tokyo Marui 5.1 internal dimensions, aftermarket parts compatibility remains total and direct. To maximize durability and shot consistency, the recommended upgrade setup includes installing a lightweight CNC aluminum slide to sustain high-pressure green gas, fitting a 6.01mm precision tightbore inner barrel with an upgraded bucking, and equipping stiffer recoil springs for faster slide reset.

Note: Requires 15-20 Days to complete this Custom Build. 

This comes with a federally mandated blaze orange tip.

Features:

• Authentic Tokyo Marui 5.1 Slide Set "Zero"
• Dr. Black 5.1 spring rod, Favos outer barrel, and 113mm inner barrel
• Preinstalled Dr. Black "Type-B" grip and fiber optic sights
• Featured in the Shot Show '25 exhibition and 2025 Lancer Tactical catalog
• Lightweight polymer slide for fast blowback action
• Metal lower frame with integrated rail for optics or lights
• Double-stack 31-round gas magazine
• Authentic slide engravings and adjustable rear sight
• Realistic field-stripping and adjustable hop-up system
• Custom built-to-order (requires 15–20 days build time)