Yes, in pistol calibers, where the short barrel doesn't neuter the ballistics, they have utility and are cool. But with the exception of the .300blk which can generate carbine performance in a 9in. barrel, I despise the concept with rifle calibers, especially 5.56 models. The 5.56 is dependent on velocity to do what it does, and reducing its effectiveness by using a short barrel is just counter productive. But that said, I'm eventually gonna get into a .300blk pistol.