When it comes to versatility, ARs rule the roost. The rifles and pistols built on Eugene Stoner’s platform are the most diverse in the firearms world. What first took form in our popular imagination as the M-16 infantry rifle has, over the last half century, morphed into a cornucopia of guns of every size, caliber, configuration and color. Some ARs are even blessed with a great sense of humor. You would have to be a cranky stiff not to appreciate the charms of a pink Hello Kitty entry carbine.
The modular design of ARs is the key to their adaptability. They are like Lego kits for gun nuts, thanks to their mix-and-match design. A shooter can swap barrels, stocks, handguards, optics, triggers and other components as quickly as a pit crew changes tires at Daytona. When it comes to ARs, if you can dream it up, chances are you can build it.