Blaser R8 Barrel .300 WSM Threaded 15X1 a0810058T
Blaser R8 Barrel .300 WSM Threaded 15X1 a0810058T, Changing Calibers The Blaser R8 is a modular system capable of switching barrels. When changing from one caliber to another within the same caliber family, no bolt head change is necessary. If going outside of the caliber group during a barrel exchange, the bolt head has to be changed as well. However, the bolt head can be exchanged quickly and easily. NOTE: Except for the Blaser Saddle Mount, no R8 components are interchangeable with R93 components.