This pistol is lighter... correct? So it makes you run a bit faster than the rifle. The BAR i'd reccomend is not for running. The BAR should only be for stationary, such as guarding, same with the Bren. Those heavy guns shouldn't be used for up-close combat, because chances are, you're gonna die. So yes the guns add in weight, but the pistol is the lightest of running, mobility, and jumping too! Hopefully I've helped you. ☻