Autotrracers are neat because they allow a nelson pump to use a Autococker slide frame.
In this post are several photos comparing Autotrracer Trigger Plates to a pre 98 Cocker slide trigger plate.
WGP Autotrracer trigger plate on left, wgp pre 98 trigger plate on the right
WGP pre 98 trigger plate on top of WGP Autotrracer trigger plate.
Another shot of a WGP pre 98 trigger plate on top of WGP Autotrracer trigger plate.
Has Ranger Rail milled on the sides with WGP pre 98 trigger frame, wgp style 007 pump, ranger internals.
Shoots nice. Trigger spring sometimes comes slightly out. Sear on hammer was cut from ranger setup to work with this trigger and frame.