Early steel AK-47 magazines are 9.75 in (248 mm) long, and the later ribbed steel AKM and newer plastic 7.62Ã39mm magazines are about 1 in (25 mm) shorter. The transition from steel to mainly plastic magazines yields a significant weight reduction and allows a soldier to carry more ammunition for the same weight.
The world loves the Border Collie for their lively, spirited temperament and their proficiency at dog sports like flyball and Frisbee games. But this breed is also one of the most intelligent, ranking number one on some scales of canine smarts.
Top of Their Class: 10 Brainy Dog Breeds. Some dog breeds are known for being incredibly intelligent. They're quick to learn a trick, and if you're not careful, they just might outsmart you. We asked 266 veterinary professionals (including vets, techs and office managers) which breeds they deemed the brainiest. The dogs shown below topped the list.