The 98 cents’ worth of plastic shims that came with your new $1,800 semiauto might be the most important part of the whole shotgun. Stock shims let you fine-tune cast and drop to get a perfect fit—and ...

POLSON - It's a highly specialized business, carving rifle and shotgun stocks out of blocks of walnut and maple and custom-fitting them to each gun, and gun owner.

The box sitting on the glass counter in front of me looked basic enough. There was nothing particularly revealing about it after the nine-month journey that had taken me to Eibar, Spain, and now an ...