aarrghh!! i tried posting a long reply on this but somthin went wrong and it didnt get posted!!
neways ill post a shorter version on what i tried to say
ok, i got a piranha myself a G3 Ext PRO 2002 w/ eforce frame its got the flush cocking and everthing. basically flush cocking means that everytime u fire the marker the bolt does not protrude out of the back of the marker and hit u in the goggles , so there's not need fer a beaver tail to be installed. the only time it comes out is when u cock the marker n thats it.
u can get reviews of the piranha
here
but thats on last years piranhas, the ones i have. upgrading it is quite easy as u can get aftermarket parts fer it anywhere and the barrel threads are the same as the spyder so getting btr barrels arent a problem. upgrades arent as many as the cocker but u can pimp it out good enough to take out all the eblades n the angels out there
nvr had any major problems with it apart from replacing an o-ring here and there, and the manual i have to say is really good as it guides u through the whole process of field stripping the marker and to get it working if anything goes wrong. understanding the marker is quite easy as its a normal blowback and field stripping is a sinch. one more thing i like about it is u can adjust the velocity just by turning a knob so no tools are required.
anymore questions on it dun hesitate to ask
cheers