the Marker is my homies marker. I checked it for him and one of the solinoids was loose so it was leakinig like crazy. I check the marker and I tightend it back up. it is shooting fine but it has just a small leak through the back of the marker. (well thats where the sound is coming from) does anyone know what the problem could be. its all stock only 2 upgrades Magnetic detents and techt L7 bolt, other than that its just stock. PVT me or just post it up here.