Magpul MAG215-BLK 5.56 NATO (.223) Dummy Rounds, 5-Pack

Good cheap plastic dummies. Great for function testing, showing new shooters or operating around the house.||These are however NOT gauges, they're slightly smaller than they should be, and are soft plastic. Use a head space gauge, these are not that.

They chamber and eject just fine but beware: they're slightly smaller than a normal .223 round. I was worried my mag was pinned wrong because it looked like I could fit 6 of these in it but no, these are just smaller than normal rounds.