Similar to the Blaser R93, the Blaser R8 is a modular system capable of switching barrels. This provides the user a wide range of caliber options. When changing from one caliber to another within the same caliber family, changing the bolt head is not 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. 

FLUTED BARREL

Fluting a barrel is an addition to the standard barrel. Using machining equipment, metal is removed from the surface of the barrel. The fluting process provides several benefits including, reduced weight, increased rigidity and a reduced chance of overheating.