The Knight's Armament SR-15 is perhaps one of the best fighting carbines currently being made. The SR-15 is joined by many other great manufacturers that have also made improvements to the AR-15 system such as LMT and HK. The KAC SR-15 is well gassed for combat loaded ammunition, reliable and sports a cold hammer forged barrel. In my testing over the years I've found it to be an ideal rifle in every way.