excuse the ignorance, I tried looking it up, but couldn't find any definitive answers.
I heard sr-15 mentioned somewhere, and besides it being a Knights offering, is there anything different that sets it apart from the ar designation? or is sr-15 nomenclature used synonmously?
I heard sr-15 mentioned somewhere, and besides it being a Knights offering, is there anything different that sets it apart from the ar designation? or is sr-15 nomenclature used synonmously?




















































