Quick view CZ 527 American Rifle Threaded 300BLK DESCRIPTION Threaded 5/8×24 (or 1/2×28 in 223) for a suppressor, this short, handy 527 is equally happy shooting steel or taking down hogs. Chambered in 223, 6.5 Grendel, 300 Blackout or 7.62×39, most of those have enough knock-down... MSRP: Was: Now: $719.99 Out of stock Compare