CZ 527, 300 Blackout Magazine ?

[Johnly]

I tried in in my CZ Grendel and the magazine wobbled, but it fit perfectly in my CZ 223. I think you're good to go except CZ 300AAC mags are hard to find.

[johno]

Well thanks for that really makes it simple.

Wonder if CZ barrels & Howa share the same thread on the barrel

Johno