Combiner Wars Devastator/Construticons.
Scrapper has the broken shovel/Devastator foot mode typical to this mold. This is a well-documented failure with the design.
There are 3D Printed/printable solutions for this out there.
I got this second hand and found that somebody tried adding details with a pen(?) or sharpie. I then tried removing some of it without success, and I purchased the Perfect Effect set new.
The original set is NEARLY complete, It includes better replacement forearms for some of the Constructicons, Guns for all 6 of the individual Constructicons, and removable forearms for Long Haul.
The original non removable forearm parts are NOT INCLUDED.