Well, the title says the gun, now it's time to for the upgrades. I realize we is not a decent brand, but I've decided on it anyway. Externals: Od pistol grips. Suppresor. Laser. Internals: 150 percent recoil spring Tbb 6.01 More efficient gas system of some type. I know nothing of gas pistols. I attempted research failed horribly. So now I've come to you Nice people in the forum. If you could link the best website to buy the gun, attachments, and internal upgrades. If anyone could better explain the gas system upgrades. I'd really appreciate it.