ACI Bulldog II my friend. Only $175 from http://www.actionvillage.com
Comes with a revomable flange regulator for easy repairment if something should go wrong. 800 psi output, and has no dropoff AT ALL even when shotting it on an RT. Also, the bottle is fiber wrapped, yet the date for a hydro test is 5 years, compared to other fibers that are only 3. They are curretnly out of stock, but they come back in on Friday which is when i'm ordering mine. Hope I helped ya out.
P.S.-make sure you buy a tank cover when using a fiber wrapped N2 tank.
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