My handguard on my carry handle AR-15 has just a factory type Colt drop in 2 piece handguard. I heard something about a thinner handguard set and was curious. Then I read where a guys set on his carbine was like 1.75 inches in diameter. The ones I currently have are 2.5 inches in diameter. Is anybody well versed in the these lower profile handguards? I would very much like to purchase a new set if indeed there is such an animal that exist. If they do where is the best place to go online for them.