How to identify pre / post ban AR-15

JeffCJeffC Member Posts: 4 ✭✭
edited March 2002 in Ask the Experts
I have a chance to buy a bushmaster AR-15 (collapsable stock), colt delta H-bar elite, and colt sportster competion h-bar. How can I tell if a receiver is pre or post ban? Also what are these worth preban vs post ban (all approx 90%).


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