For rifles that were issued, nearly all have been overhauled and up to date at some point. Most undoubtedly are a mish-mash of components and were upgraded as needed. Here are several of Those people elements. So as opposed to one particular from the chamber, two in the journal, like https://www.safeheavenfirearms.com/product/steyr-aug-a3-m1-5-56-nato-16/