I do have one odd ball. My Savage FCP-K is 223, but the factory threads them 5/8x24. I can't shoot my 5.56 can on it, but that is ok because my 30 caliber can is 5/8x24 also, and I prefer to use it on my bolt guns.
I buy two in the morning pretty much every morning. They are both usually gone within 30 minutes.
If I end up in a gas station around lunch, I will buy two more.
As I said, more addictive than tobacco.
Oh, I see what you are talking about now. The pictures in the OP are from the guy I bought it from. I haven't received it yet. That is his can in the picture which appears to be a SWR/Silencerco can maybe?
That's not me, my gun, or my video. Just an example of what I am going for.
My can is a HTA Guardian 9 which I am probably going to ruin because it isn't full auto rated.