In the short time Ive been a nutter I can recall seeing a cuple of threads on this very subject.
Lets have a genuine side by side shoot off with a stock 305 as a benchmark and compare the tricked out, tuned up non stock 305.
Sadly there were never any takers as I recall. Which is a shame because these guns have an auotomatic reputation for being lousy out of the box.
But if Id spent a crap load of money on parts I dont think I would want to find out either.
If the truth were to come out the economy would collapse LOL
Your money your gun have fun, but it would be a hell of a day at the range, think of the bragging rights when you beat a 5000 dollar JAE,SAGE etc with a basic 305
or vice versa as you stomp all over the basic 305. Any and all states of tune allowed, what a hell of a day

Just my 2c, cos Im a cheap bastard and want value for every cent I spend.
Very happy knowing that I can easily hit a 6ftx2ft vertical target at 500 yds, just like a 2000 dollar Springfield