V accurate as its a closed bolt, although pre 2k3 shockers never particularly changed much from their first design, depending on what purpose you want it for, it would be incredibly sluggish for a tourney marker, but perfect for woodland.
v consistant but i hope uve got big arms (weigh an absolute tonne)
only real upgrade you could easily get for them would be a barrel as it shares the same thread as the new one, feed tube is threadless so you out of luck there.
Planet might have a few upgrades settling dust or you could even try Smart Parts if you fancy a Remorgage