Case used for AR-style rifles. They are mostly 5.56mm, but can contain some 223 Rem. Most of these have the military crimp, so it must be removed before they can be used.
These are range brass that have been hand sorted with some inspection for major issues and then boxed up for your use.
We’ve hand sorted these (me and my kids). Besides sorting them by type, we’ve removed brass that has damage to the mouth, cases that are blanks and any with dents other than a small one on the shoulder. While we may miss some, we cull about 5% of our stock if that gives you an idea of the quality.