The best way to add efficiency or a personal touch to any handgun — whether it’s a new purchase or a family heirloom — is to accessorize. Adding bling can not only make a handgun more effective it can give it added appeal — such as the implementation of custom grips or a drop-in trigger or laser sight, as examples. More mundane but equally important purchases such as cases, holsters and ammunition storage options complete the package. And as a retailer, it’s important to...