Pics denoting various 3” M10 variations:
Barrel profiles side-by-side – Standard (M10-5) on left, Heavy (M10-8) on right.
Pic below of Pre-Model numbered M10 Standard Barrel, originally from the Gary Garbrecht collection
Model 10-4 Standard Barrel, extremely hard to find engineering change, a well used Police Gun
Others with Standard Barrel profiles:
A few interesting Heavy Barrel models:
A M10-8 non-pinned nickel square butt gun, very scarce configuration:
A M10-8 non-pinned nickel round butt gun:
A M10-8 non-pinned matte blue gun (acquired from the Wayne Betz Estate:
A M10-8 pinned blue round butt gun:
A later M10-8 non-pinned blue round butt gun:
And a very cool M10-10 shrouded barrel blue Brazil Export gun:
S’all I got…..