{{Hebiquote
|quotetext=The Mark 18 is one of the shortest members of the AR-15 family. It is a further development of the [[Colt M4A1|M4 carbine]], with an even shorter barrel - 10.5 inches instead of 14.5 inches. It is very popular among all sorts of people, but particularly heavy weapons users, as it essentially a very short M4A1; uses the same magazines, has the same ergonomics, yet short and light enough to allow carrying two other, larger weapons (or a heavy flamethrower, complete with fuel tank). The very short, submachine gun-like dimensions of this rifle have led to it (and similar rifles) being referred to as "'subcarbines"'.
|quoteauthor=Tempest
}}