Just a observation... there are many AR-15's for which steel cased ammunition is not problematic. I have run an untold amount of the Wolf 5.56mm through my COLT Hbar without any problems at all. It has functioned with complete perfection regardless of the ammunition or magazine used. I have owned and used this rifle since 2003. Maybe the reported issues concerned earlier rifles or those with less consistent manufacture. JMHO. Sincerely. bruce.

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