Colt post WWII field replacement (post 1949). These barrels will always have a “P” and/or a “C-in-square” marking on the lower lug. Barrels without these markings are commercial production.
![Colt M1911 Barrel Markings Colt M1911 Barrel Markings](https://sightm1911.com/lib/history/Colt8.jpg)
Colt post WWII field replacement (post 1949). These barrels will always have a “P” and/or a “C-in-square” marking on the lower lug. Barrels without these markings are commercial production.
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