If you are going by the antique rules yes.
If going by the rules proposed and largely accepted here it is. Here is the "Long and short of it":
Pump Paintball Gun - Some manually actuated mechanical manipulation must be performed to load a ball and/or cock the action (No pneumatic assist, electronic, or mechanical advantage is allowed to assist in moving the bolt to load the paintball)
Stick Feed (Single stacked paintballs, 20 round max) running parallel to the gun or Vertical Stick (10 round max). No force feeds/springs allowed.
Single 12-gram changer (No 6-paks, turret changers etc)