I bought a used m700 a couple years ago but haven't fielded it. The seller calimed the following upgrades:
-PCS bolt with forse nozzle
-Best gun metal part 91 chamber block
-King arms vsr10 conversion chamber
-King arms red bucking
-Pdi 6.01mm barrel 430mm(has a shortened barrel)
I'm getting back into the sport and wanted to get this thing going so I shot it a little today. It was pretty erratic with KA .4g bbs. I messed with adjusting the hop up but not much change occured. 30 yards was hopeless, when I shot from 10 yards it would be dead on 1 shot, then curving way up and sometimes either direction to the side as well. I don't have my air rig set up yet, this was with propane so I realize there should be some inconsistency. But with those hop up and barrel upgrades, it should not be this bad. If those BBs are god awful it would explain it, but otherwise I'm not sure what else to do past the air regulator. I'm not great at messing around with internals, but something needs to be done. If I could get some ieas it would be greatly appreciated.