Mauser416 do you know if your gun will have the machined monoblock that Jim uses or are you using the shotgun barels as the monoblock? Also, will your gun have the muzzle block that Jim uses (405 Winchester/Stoeger gun)? I ask because I emailed Jim awhile back and said I wasn't a fan of the big monoblock and muzzle block that he uses; not very clean looking. He said we was experimenting with a different muzzle block for regulating that wasn't so glaring.