Synthetic stocks have double palm swell and no cheekpiece or cast making them ambidextrous, with the exception of the R8 Success. Wooden stocks are true left or right hand with single palm swell, cast, and cheek piece. All Blaser R8 stock receivers include an integral alloy metal receiver and one fire control unit trigger group. Blaser recommends a steel receiver for use with .458 Lott and .500 Jeffery calibers.