Hi-Capa 4.3 Vanguard Optics Ready Gas Replica and Compensator ARCTURUS

The ARCTURUS Hi-Capa 4.3 Vanguard Optics Ready gas replica with compensator, a GBB handgun built for performance and customization

The Hi-Capa 4.3 Vanguard Optics Ready with compensator by ARCTURUS is a semi-automatic GBB airsoft handgun designed for demanding players who want a high-performance base, optics-ready straight out of the box with no prior modification required. With its CNC-machined aluminum body and slide, QPQ-treated MIM steel internal parts, and its 6.03 mm inner barrel with ENT treatment, this replica is aimed at both field players and enthusiasts looking to build a custom setup on the Hi-Capa platform.

CNC construction and high-quality steel internal finish

The slide is CNC-machined from aluminum and features a pre-cut RMR-format notch, allowing a red dot sight to be mounted without a specific adapter. A 19 mm pitch RMR plate is included as standard. The metal compensator is integrated at the muzzle end, contributing to the replica's overall balance and competition aesthetics.
The moving internal parts (slide catch, hammer, mag release, chien, trigger, cut-off lever, valve knocker, firing pin lock) are made from MIM steel with a dual QPQ heat treatment. This process improves wear and corrosion resistance. The barrel nut is also made of steel. The grip, in nylon fiber-reinforced polymer, provides a stable textured feel, and the magazine components are made from SEFP (Super Enhanced Formulated Polymer), a polymer formulated for mechanical durability.

Inner barrel, external threading and optics package

The inner barrel measures 97 mm and features a 6.03 mm bore in ENT-treated (Enduraheat Nitride Treatment) carbon steel, a nitriding heat treatment that improves surface hardness and corrosion resistance.
The outer barrel housing the compensator is made of metal and threaded at 11 mm CW, allowing a compatible suppressor or tracer to be screwed on without an additional adapter. A 3-slot Picatinny rail is integrated under the barrel for mounting a tactical flashlight or laser. The default sighting system combines a rear sight on a plate with a green fiber optic front sight, offering fast target acquisition in standard conditions.

Blowback, gas system and Tokyo Marui Hi-Capa compatibility

The Hi-Capa 4.3 Vanguard features a blowback system with pronounced recoil and pre-shot technology, which optimizes the firing cycle by slightly anticipating the gas feed. The system is designed to operate below 10°C, a practical advantage for gameplay sessions in cold weather where conventional GBB handguns lose reliability.
The replica is compatible with Tokyo Marui Hi-Capa parts, making it an ideal base for a custom build or upgrade. The hop-up is adjustable. The controls (safety, slide catch, mag release) are ambidextrous, making it fully usable by both right- and left-handed shooters.

• What are the mounting options for a sighting aid on the Arcturus Hi-Capa 4.3 Vanguard?

  This replica features a CNC-machined slide with a pre-cut notch designed to directly accommodate an RMR-type red dot sight. A 19 mm spacing RMR plate is included in the box to allow immediate installation of a red dot sight.

• Is the replica compatible with accessories designed for the Hi-Capa standard?

  Yes, the Hi-Capa 4.3 Vanguard ARCTURUS is designed to be compatible with both internal and external parts built to the Tokyo Marui standard. This design greatly simplifies maintenance, component replacement, and customization of your setup.

• Is it possible to fit a suppressor on this model?

  The metal outer barrel features an 11 mm CW (clockwise) thread. You can therefore fit an accessory or a 14 mm CCW adapter to mount a suppressor or a tracer compatible with this thread pitch.

• What are the advantages of the materials used for the internal parts?

  Internal parts such as the hammer and trigger are made from MIM steel with QPQ heat treatment. This technical process significantly enhances wear resistance and the overall durability of the internal mechanism under the stresses of repeated firing.

• How efficient is the gas system in cold weather?

  This GBB airsoft pistol integrates an optimized gas system designed to maintain stable and reliable operation, even in temperatures below 10°C.

• What is the purpose of the rail located under the barrel?

  The replica features an integrated 3-slot Picatinny rail under the barrel. It allows you to easily attach various tactical accessories such as a tactical flashlight or a laser to improve your effectiveness during gameplay.

• What exactly does the Hi-Capa 4.3 Vanguard ARCTURUS box contain?

  The box contains the replica, a gas magazine with a capacity of 31 BBs, a 19 mm spacing RMR plate, a cleaning rod, and two Allen keys. The product also includes spare parts and adjustment accessories: a set of O-rings, a recoil spring, a hop-up tensioner, and the user manual.

1 x ARCTURUS Hi-Capa 4.3 Vanguard Optics Ready gas replica with compensator
1 x 31 BBs gas magazine
1 x 19 mm RMR mounting plate
1 x Cleaning rod
2 x Allen key
1 x O-ring set
1 x Recoil Spring
1 x Hop-up tensioner
1 x User manual

• Pistol replicas
• Caliber 6 mm
• Propulsion Gas
• Shooting mode Semi-automatic
• Energy 0.8 Joules
• Speed 293 FPS
• Model Hi-Capa 4.3 Vanguard Optics Ready and compensator
• Length 225 mm
• Internal barrel length 97 mm
• Internal barrel diameter 6,03 mm
• No screws 11 mm CW
• Weight 930 g
• How it works Adjustable Hop-Up
• Design Aluminum / Metal / Steel / Polymer
• Blowback system Yes
• Integrated tactical rail Picatinny
• Charger 31 BBs
• Colors Black
• Brand Arcturus