One nice thing about a 15" (I have 15" HG's on 2 of my uppers with 18" barrels) is that if you want to do any precision work with them, getting a bipod out farther helps in stability. I really like them. The only drawback I've found is trying to mount a magneatospeed chronoraph on them is kinda a PITA, but I've been able to work around it.