KC-02 to M4 HPA Adapter – Plug and Play

The KC-02 to M4 HPA adapter is a plug-and-play conversion module that transforms your KJW or ASG gas pistol or compact rifle platform into a high-pressure air system. HPA offers stable velocity across temperature swings and seasons, making it ideal for consistent accuracy and reliability in UK woodland and urban skirmish environments.

Key Features

• Plug and Play Installation – no modification required; drop-in design saves time and protects your original internals.
• KJW/ASG Platform Compatible – supports KC-02 and SSQ22 platforms with direct fitment.
• M4 Adapter Interface – connects to standard M4 HPA engines and tanks, expanding your upgrade ecosystem.
• Pressure-Independent Performance – HPA eliminates gas dependency, delivering stable FPS across cold weather and extended play.
• Compact Design – maintains handling and CQB ergonomics despite the HPA conversion.

Real-World Use Cases

• UK CQB and Indoor Sites: HPA stability ensures consistent grouping indoors; plug-and-play means you stay field-ready without downtime.
• Woodland Skirmish: Temperature-independent performance is a game-changer in British weather; your velocity stays locked across morning chill and afternoon warmth.
• Year-Round Play: Upgrade from temperature-sensitive gas to HPA and eliminate seasonal FPS loss, ideal for UKARA regulars running multiple sites.

Technical Specifications

• Adapter Type: HPA conversion interface
• Platform Compatibility: KJW/ASG KC-02, SSQ22
• Tank Interface: M4 HPA engine standard
• Installation: Plug and play

Compatibility & Upgrades

This adapter works with standard M4 HPA tanks and regulators, letting you integrate any mainstream air system. Pair with high-capacity HPA bottles for all-day skirmish; combine with precision barrels and quality hop-up units to maximise the consistency HPA provides. Compatible with 0.20 g to 0.30 g BBs depending on your base platform’s tune.

UK Legal & Site Notes

This adapter is a component and does not itself define legality; however, the assembled weapon (KC-02 or SSQ22 base plus HPA system) must comply with your local site’s FPS limit. Before purchasing, confirm your site permits HPA systems and specify your desired velocity in joules. Always check whether your site requires a two-tone or full-black finish on the parent platform. UKARA registration or VCRA defence is recommended for any RIF.

In Stock & Dispatch

This item is currently out of stock. Sign up for a restock alert to be notified when it returns. Airsoftdirect delivers nationwide within 1–2 working days on in-stock items. Browse our HPA adapters and gas pistol upgrades to find compatible alternatives or complementary parts.