Yes, I heard that too.
I actually want to get a .17 Hornet before they change the bottom metal. I like it for some reason.
I was a fan of the original 452 as well.
The 452 was a .22LR, I think you're thinking of the BRNO Fox, or a BRNO 465 which has a little longer mag in the .22 Hornet, also chambered in .222 .
It carries fine in my 7.62x39 carbine
Nothing wrong really with a protruding single stack dbm, just know that a staggered column internal mag with hinged floorplate, would serve the .223 & .204 chamberings so much better.
If the mag is long enough and the twist tight enough, I would consider reaming one out to .22-204 75 Amax .
