Re: model 7 receiver
To answer cousinadkins' question. The original XP100 single shot actions had the action screws in different locations than the 600-660 series, and also different than the later XP100R and RX100 models, which are the same/similar to M7. The rear tang is also shorter on the XP100, 600-660 series,than on the XR_RX_M7 series.
I know this since I built up a rifle using a 660 Mohawk action and a Model 7 stock w/bottom metal and trigger.