I assume you meant "don't come with irons". The reality is most people who get bolt-guns do so with the purpose of hunting or long distance shooting. For those purposes, glass >>> irons, so why not skip the middle man and just let them add whatever scope they want? Look at Savage Axis, they come with iirc Leupold scopes for a lot of their packages. Even CVA (the people who make those break-action single shot $250 rifles) come with scope mounts, but you CAN send them back to the factory to get iron sights fitted and zero'd free of charge iirc.