Gate Electronics are now into the airsoft HPA engine business with their rear-wired Gate Pulsar D HPA Engine with TITAN II Bluetooth that you can find at Airsoftjunkiez. According to them, the PULSAR D HPA engine for airsoft guns offers exceptional accuracy, versatility, and ease of use. With firing rates of 1-40 rounds per second and velocities of 250-650 FPS, it's great for any airsoft playstyle. The innovative design ensures consistent performance and easy calibration, while Bluetooth connectivity allows for remote trigger control and customization via a smartphone app. Its compact size fits in most guns, and it even works with standard AEG nozzles.