azodin KPC Pump Paintball Marker (Gold)

I got it yesterday and was excited to finally play pump, but first i took out my chrono and it was only shooting 175-200. I tried to adjust the spring on the back and it literally did nothing, took it apart multiple times tried to replace springs etc.. didn't do literally anything, i was like what ever and played anyways with it and got about 8-10 outs with it but it didn't have much reach at all. So i took it to the maintenance dude at my local paintball shop and he put in two disks into the regulator i guess to make it shoot with more PSI, still only shoots about 220-250. If i could get it to 300 FPS it would be amazing but i guess if you want quality you gotta pay a bit more. Get something with an adjustable regulator.