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Old November 7, 2021, 09:52 AM   #13
Jim Watson
Senior Member
Join Date: October 25, 2001
Location: Alabama
Posts: 17,787
Flat or not, the proportions look like the MR73 barrel tenon is larger than Smith.
I'll compare mine.

ETA: Optical illusion, my MR73 SN 125062 tenon is a bit smaller than Smith M19-0, ca 0.485" vs .495". But the protrusion back through the frame is less, .075" in MR73, .140" for Smith.

My M67 has the most tenon flat, the M19 not as much, the MR73 none visible. Perhaps they changed the gas ring to need clearance, I have had mine some years.

Last edited by Jim Watson; November 7, 2021 at 11:57 AM. Reason: Data
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