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AR Question - Problem?

705 Views 11 Replies 9 Participants Last post by  demented
I have a Bushmaster 223 and I noticed that a couple of the unfired rounds I pulled from the chamber had marks on the primer like the firing pin hit the primer when the shell was loaded. Has anyone seen this before or know what could be causing this?
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IMO, that's common enough to be called normal for the AR platform. It's caused by the floating firing pin. I first saw it in the mid 70's when my grandpa bought the first AR I had ever seen, a Colt SP1. Every AR I've ever paid any mind to did it.

From the Colt AR15 owners manual.

Note1: On Colt 223 cal firearms, it is normal for a light firing pin indent to appear on cartridges which have been fed into the chamber, but not fired.
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