Airsoft GI Custom Niji 5.1 Hi-Capa GBB Airsoft Pistol

Premium Custom Build

The Airsoft GI Custom Niji 5.1 Hi-Capa Gas Blowback Pistol combines high-end performance with striking aesthetics. Built from CNC aluminum and stainless steel components, this pistol is engineered for strength, precision, and reliability. Featuring the Atlas Custom Works EX01 slide and frame kit with lightweight cutouts and a stainless steel fluted threaded barrel, the Niji is both competition-ready and customizable for tracers or suppressors.

Enhanced Internal Performance

Internally, this build is reinforced with a CNC blowback housing, steel disconnector, and valve knocker for durability under heavy use. A Unicorn 6.03mm precision inner barrel and CNC hop-up chamber maximize accuracy and consistency, while the Dr. Black recoil spring ensures fast cycling. With a 31-round magazine and a velocity of 310–320 FPS, this pistol is tuned for serious players seeking both power and reliability.

Stylish and Functional Upgrades

The Niji is designed to stand out with a slim wolf gray ergonomic grip paired with rainbow-accented CowCow upgrades, including the hammer, trigger, guide rod, and silencer adapter. It also comes equipped with a Lancer Tactical x Acetech Bifrost tracer unit that produces multi-color flame effects, and an Atlas Custom Works M1 Micro Red Dot sight for rapid target acquisition. Packaged with a padded 13-inch Code 11 pistol bag, this complete kit provides everything a player needs in a premium sidearm.

Specifications

• Brand: Airsoft GI
• Model: Custom Niji GBB Airsoft Hi-Capa
• Type: Gas Blowback Hi-Capa Pistol (custom)
• Material: CNC aluminum and stainless steel components
• Magazine Capacity: 31 rounds
• FPS: 310-320
• Package Includes: Gun (as pictured), magazine, gun bag
• Color: Gray/Black with rainbow-accented components

Features

• Fully custom-built premium Hi-Capa pistol
• CNC aluminum EX01 slide and frame kit with lightweight cutouts
• Stainless steel fluted threaded barrel for tracer or suppressor compatibility
• Precision CNC blowback housing for smooth cycling
• Upgraded steel disconnector and valve knocker for long-term durability
• Unicorn 6.03mm inner barrel and CNC hop-up chamber for accuracy
• Wolf gray slim ergonomic grip with aggressive texture
• Rainbow-accented CowCow upgrades: hammer, trigger, guide rod, silencer adapter, grip screws
• Lancer Tactical x Acetech Bifrost tracer unit with RGB flame effects
• Atlas Custom Works M1 Micro Red Dot sight included
• 31-round Hi-Capa magazine with extended baseplate
• Comes with padded 13-inch Code 11 pistol bag

Please Note:


• Gas is NOT included.
• Please allow for SEVERAL BUSINESS DAYSfor construction of the custom.