I have the same body but mine is the dark red to light red fade with black splash. From what i have found is they were only sold as a body front/back blocks and asa. they werent a full gun release. I had to post it here to figure out what it was. Smoothest pump i own.
Any one can make it shoot faster... but its more fun to make it a pump!
Machinist and R&D for Gearheadz PB