I bought a Milsig M17
I bought a Milsig M17 and had to buy the air tank separately at $60. The disks were burst from the get go, so it never held air. I replaced the disks, pumped it up to 3000psi from my compressor and the tanks gauge only read 2000 psi. It then proceeded to leak out all the air in it over the next week. I use it for self defense, so this wasn't cutting it for me. I purchased a First Strike tank at another $50 from another vendor and it's been aces ever since. I belong to many groups involving air guns and this isn't the first I've heard about these Valken tanks being bad, of course after I had already purchased it. The gun is great and fires reliably and hard, after I turned up the FPS and deleted the PRV. I would recommend the gun, but don't buy a Valken tank. Get a First Strike or a Ninja.