The Firing Line Forums - View Single Post - M1 Garand barrel chamber and headspacing question.

**Unclenick** · December 24, 2012, 06:45 PM

There is only one .30-06 M1 Garand and only one .308 M1 Garand Criterion barrel offered at the CMP store. They are made from 4140 alloy CHROME/MOLY steel, meaning there is about 1% chromium and 0.2% molybdenum in the steel alloy. It is not chrome-lined. I have two of them and can verify that for you.

If you want to buy a chrome-lined Criterion barrel, it will have to come from some other source than the CMP and it will be fully chambered to a middling chamber length value.

December 24, 2012, 06:45 PM	#13
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 9,140	False alarm There is only one .30-06 M1 Garand and only one .308 M1 Garand Criterion barrel offered at the CMP store. They are made from 4140 alloy CHROME/MOLY steel, meaning there is about 1% chromium and 0.2% molybdenum in the steel alloy. It is not chrome-lined. I have two of them and can verify that for you. If you want to buy a chrome-lined Criterion barrel, it will have to come from some other source than the CMP and it will be fully chambered to a middling chamber length value. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Patron Member