GATE PTX HPA NBB Pistol with PULSAR S2 HPA EngineWhy PTX? Precision. Reliability. Instant response. The GATE PTX isnt just a sidearm its a compact, high performance SMG in pistol form. For the first time in airsoft history, a compact pistol features a fully factory integrated electropneumatic HPA engine: the PULSAR S2. Designed as our latest breakthrough, the PULSAR S2 is engineered as a single unit with a VSR style hop up chamber and paired with the class leading ASTER II Bluetooth PTX electronic