Win Gun C304B CO2 NBB Pistol – Black

The Win Gun C304B CO2 NBB pistol is a gas-blowback sidearm engineered for consistent performance on the UK airsoft field. Built on the proven CANiK SFx RIVAL platform, this NBB (non-blowback) design fires at approximately 300 FPS with 0.20 g BBs, delivering reliable accuracy and impact over short to medium engagement distances. Its semi-automatic firing mode suits both CQB indoor sites and woodland skirmish play, while the compact 20.5 cm length keeps it nimble in tight spaces.

Key Features

• Gas blowback action – realistic slide cycling and tactile feedback with each shot, enhancing immersion and reliability.
• 300 FPS performance – approximately 300 FPS using 0.20 g BBs, suited to UK skirmish and CQB site limits.
• Alloy and steel construction – durable outer barrel, slide, and controls withstand regular skirmish use without excessive weight.
• 20 mm pistol rail – compatible with standard airsoft tactical lights and laser modules for customisation.
• 22-round low-capacity magazine – enforces magazine discipline and realistic engagement in milsim and competitive play.
• Accessible hop-up adjustment – hop-up sits on the outer barrel and is accessible when the slide is removed, allowing field-side range tuning.
• Lightweight and compact – approximately 0.55 kg and 20.5 cm in length, perfect for secondary weapon or CQB primary roles.

Real-World Use Cases

• UK CQB indoor sites: The compact length and 300 FPS output sit comfortably within typical CQB site limits; its semi-automatic mode and 22-round capacity encourage disciplined play.
• Woodland skirmish secondary: As a sidearm on a primary rifle kit, this pistol provides a lightweight backup for when ammo runs dry or tactical repositioning demands a faster draw.
• Speedsoft and pistol-focused events: Realistic blowback action, responsive controls, and a 20 mm rail system make it an attractive choice for players building a dedicated pistol loadout.
• Milsim training and progression: Its straightforward GBB operation and low round count encourage realistic engagement discipline, ideal for players transitioning from AEGs to gas-powered systems.

Technical Specifications

• Brand: Win Gun.
• Model: C304B (CANiK SFx RIVAL platform).
• Product Type: Gas blowback NBB pistol.
• FPS (0.20 g): Approximately 300 FPS (±10%).
• Length: 20.5 cm.
• Weight: Approximately 0.55 kg.
• Inner Barrel: 4.5 inches.
• Magazine Capacity: Approximately 22 rounds (low-capacity gas magazine).
• Magazine Type: Gas, low-capacity.
• Hop-Up: Adjustable on outer barrel; accessible when slide is removed.
• Firing Mode: Semi-automatic.
• Power Source: Green Gas.
• Construction: Alloy outer barrel, slide, and controls; steel pins and screws; aluminium magazine well extension; polymer frame and backstrap.
• Rail System: 20 mm pistol rail.
• Colours: Black, Grey, Dual Tone.
• SKU: 111790.

What’s in the Box

• Win Gun C304B pistol.
• Gas magazine (22-round capacity).

Compatibility & Upgrades

The Win Gun C304B accepts low-capacity gas magazines designed for the CANiK SFx platform; ensure you source compatible spares if planning extended skirmish days. The pistol requires Green Gas for consistent operation across UK temperatures; consider upgrading to duster gas cans for winter use in colder climates. The 20 mm pistol rail accommodates standard tactical lights, lasers, and red-dot sights for improved target acquisition in low-light CQB environments. Standard 0.20 g, 0.25 g, and 0.28 g BBs are all compatible; heavier BB weights (0.28 g–0.30 g) improve range and accuracy at distance, though may reduce FPS slightly. Common upgrades include a tighter bore inner barrel, upgraded hop-up rubber, and stainless steel tightbore bucking for enhanced range and consistency.

UK Legal & Site Notes

The Win Gun C304B is a realistic imitation firearm (RIF) and is restricted to players aged 18 and over. In the UK, RIF ownership and use are protected under the VCRA (Violent Crime Reduction Act) by a UKARA defence or equivalent airsoft site membership. You must register with a UKARA-recognised airsoft site, skirmish centre, or equivalent community before purchase. Two-tone variants are available if you prefer a pre-painted non-realistic finish. Before attending any skirmish, confirm your site’s FPS and joule limits; this pistol’s 300 FPS output should suit most UK CQB and general skirmish sites, but always verify in advance to avoid disappointment or removal from play.

Stock levels are currently low; however, our fast UK dispatch means that when the Win Gun C304B is back in stock, we’ll have it ready to ship within 1–2 working days. Explore our range of compatible gas magazines, tactical pistol accessories, and performance upgrades to complete your loadout. Contact our customer service team if you have questions about platform compatibility or site suitability.