just googled the shockers it looks like a SFT to me, no leaks or anything, shoots fine, no missing parts, as far as im aware the only upgrades are the blackheart board, and the all american front.
When my mate gave me the marker it had an asa with a carbon bottle attached to it, which ive swapped over for a normal asa, as he getting the bottle tested, its a 1.1 4.5k if that would interest you, will put details and pics up once it comes back from hydro test.