Uhhhhhh basically every 4500psi tank on the market especialy ACI's bulldog tanks. But you cant even compare these to angel airs and air americas systems but they are outrageiously expensive (no offense WDP or air america) You might try PMI's tanks to get similiar results
02 Green Vert cocker:hinge trigger,DYE stickies,shocktech pnuematics,shocktech bolt,shocktech drop,Java 45/4500,CP 2 piece barrel,12 volt revvy with x board,STO reg
It is a good air system for the money and is really consistant. It keeps up pretty well in consistancy with Air America and such brands. I really havnt shot angel air much so I will say more about as the year goes on. But the ANgel system is sooooo expensive:-(
Nothing really it is a great all around tank for a cocker or any lo pressure guns (AKALMP,WGP Cockers,etc etc)
Very good tank. For the money and i would definently suggest it for tournament use .Very reliable.But if you dont have the money nitro ducks systems are comparable to this system.