Getting ready to finish up my ar project, decided on 300black out. Plan and simple, something to plink something to hunt with. I was given a mid flat rate box full of once fired 556/223. So I have a lot of brass to convert. After a lot of research I came up with using 3/8 aluminum channel, scrap wood, shelve pins, epoxy putty, and grilla glue.
Only change is I took quick steel and made a molded raised area for the brass. Kinda a prototype, right now. I need to figure out a stop so I don't cut thou the channel. Cleaning up the mounting as well