What's the best CO2 repeating Pellet pistol > 450 fps under 150$?

[tehsquirrel]

Ok, title says it all, go!  So far I see the crosman vengeance...  Not sure what else?  I guess I could save up my pennies and have Tim go through a pistol....

[silent_airman]

You can actually take a stock 2240, add a BNM breech with Marauder mags and come close to a repeater. In my experience, a CO2 repeater is not very practical, due to the drop in pressure with each rapid fire shot. This does not allow the CO2 to return to full operating pressure, depending on ambient temps of course. Ideally, you should allow up to a minute between shots to get back up to full pressure. The BNM would work well in that regard. You can get a breech for about $130, and the 2240 for about $60 new. There is probably a healthy market for used guns so you could save money there.

http://www.bnmcustom.com/products_categories/breaches/