AR Sponsor
Posted: 6/10/2007 12:57:06 PM EDT
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I have a 16 inch AR barrell heavy that was not stamped with markings as to how is was chambered. It was supposedly made be Shaw, with a 1-9 twist rate, but no markings. Just by looking at the barrel is there a way to determine how is was chambered? Sorry for the NEWBIE question. 
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AR Sponsor