The Airsoftjunkiez PolarStar Fusion Engine Gen 3 V2 with Red Nozzle and Poppet is available again and you can order it from their online store. This is a rebranded engine and features what you can expect from PolarStar Airsoft. For custom HPA rifle orders, you can ask Airsoftjunkiez if they can install this engine for you. Here are it features:

• Full Auto, Semi-Auto Only (Sniper) and Programmable Burst Fire Modes
• User Selectable Open Bolt and Closed Bolt Firing Modes
• Instant trigger response (faster than a MOSFET w/ lipo)
• Easy to use Fire Control Unit (FCU) with LCD display and five position joystick
• Independently adjustable velocity (FPS) and rate of fire (RPS)
• Fits all major airsoft AEG manufacturers M4/M16 receivers (KWA & King Arms need special tooling)
• Uses TM-compatible M4/M16 AEG Magazines
• Designed and Manufactured in the USA. Patent Pending Design