Top is a Silver Bullet 2. Middle is a first gen NW Comp. Bottom is an NW Comp 2 which should technically have the slide frame (might have it in a box).
The earlier NW pump use a frame nearly identical to Earon Carter’s early comps.
Later NW comps use a frame very similar to The Wintec sliding frame found on Ghosts, Tasos and Wintec pumps.