Mauser Bump or Hump

[Thor]

The early Mausers had mixed humps and no humps, but fer instance, the Gs seem NOT to be humped, but they all have a thickened back where the hump is to better contain the rear axle pin during the rearward most movement of the receiver forks. The humped Mauser simply had some of the thickened rear frame REMOVED to form the hump. Thor