There are multiple ways to set up a short-barreled rifle. What comes into play is the amount of rail space you have and prioritizing that based on mission requirements. In the following video I take some time to describe why I have my rifle setup the way I do after having used the MK18 Mod 1 for a hot minute.
About the Author
Garand Thumb Active duty in the military. He spends his time parachuting from anything that flies. On his off time he shoots and spends time with his family.