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AR15.COM
6/29/2015 4:45:58 PM EDT
So I have a 1911 barrel that is marked "HEC" on one side of the lugs and "MP" on the other. On the outside of the chamber it reads:

.45 AUTO
7791193

It is chrome lined and parkerized. I haven't been able to find out who the manufacturer is. Does anyone know?
6/30/2015 9:47:32 AM EDT
[#1]
this help?
http://www.sightm1911.com/lib/history/barrel_markings.htm