We are currently testing our own Blaser R8 Barrel adapters. We created these in an effort to make more affordable and more accurate Blaser R8 Barrels using almost any barrel blank brand or contour. These are made from 17-4 H900 Stainless steel and feature mounting screws for our 20MOA Picatinny rails. We plan to offer the adapters as well as complete barrel assemblies after testing is complete. We are currently testing these in 223 and 375H&H calibers and will be adding 308, 7 SAUM and 300 Win Mag in the next few months. These are drop in replacements for any Blaser R8 rifle barrel.