Sinasta CGN Ultra frequent flyer Rating - 100% 74 0 0 Location At The End Of The World Feb 10, 2006 #1 I was wondering how to tell what calibre the chamber is 5.56 or .223
M Mike K CGN Ultra frequent flyer Rating - 100% 34 0 0 Location Lower Mainland, B.C. Feb 11, 2006 #2 On an AR it should be stamped on the barrel near the flash hider.
