Back to the original post, I have a fairly limited number of Mongoose figures, but the Mongoose humans I own (the basic SST Troopers, and the plastic Gangs of Mega-City One box) are very noticeably taller than any of the similar figures I have. That would include GW's 40K and Necromunda, EM-4, Copplestone, Heresy, Pig Iron and Hasselfree. IMO, I would not mix those companies with Mongoose. I'm very free with mixing ranges from different companies, but Mongoose figures are a full head taller than any of my other post-apoc or Sci-fi figures. I would advise caution.