This is the original style of the tippmann 98. So what does that mean??
-all aluminum power tube and valve assembly. This was sold as an aftermarket accessory later..
-no cut outs inside the body for aftermarket "drop-in" parts.
-Different trigger return spring set up.
-much smoother machined hammer that can be polished to a high luster.
-Metal back end cap rather than the plastic end cap later used.
-Non-removable trigger guard like the custom had.
-early models did not have the split rubber grips, so the grips had to be removed on one side to split the body in half.

Aftermarket/Custom Changes:
-Beadblasted and then clearcoated with auto paint
-Lapco barrel
-Lapco Sight Rail
-Psychoballistics rear velocity adjuster
-Shorter factory velocity adjustment screw to be backed all the way out and still not stick out of the body hole
-Lightened the trigger return spring.
-Polished the following: hammer, connecting rod, inner body where anything moves, aluminum power tube, spring guide, trigger area. This puppy could shoot a tank down and shoot everytime without going into the bouncing "full auto" mode....