Send it back again..30 Cal. But my gun is a lemon. It actually came from the retailer with zero pressure in the bottle and the bottle was loose, the bracket that attached the bottle to the picatinny rail underneath it was loose. From 300 bar pressure, the tank would lose air completely in two days. I sent it to AOA for repair and they found that the O ring was the problem so they replaced it. And after I got it back I only shot 8 mags before I started to feel this air blowback, there is a strong air blowback from the left side of the gun near the mag that hits my chest, at every shot. Before this leakage, it was shooting 930FPS with 149 bar at the reg, and now with the leakage it shoots around 875FPS.
If it does not work, ask for a new one in perfectly order. AoA are serious and those rifles are their project. So they want and win with satisfied users.
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