They weigh in at about four pounds a rack, so that's about twelve pounds total. I cut them in to half racks so they would fit in to the vertical smoker. Three up, three down.
I think the changeable plug was either a later addition or a feature of the standard M240. I don't recall it being present in the 240C. The 240C was a special use version that was solenoid operated and could only be used as a coax.
I didn't even think about the glove!
I actually competed in machine gun marksmanship competitions using the M60. We ran three man teams. The gunner (me), an assistant gunner, who helps with barrel changeouts and is the backup gunner, and an ammo bearer, who carries ammo and helps carry the gun. Our team took first place in our...
I always thought it was quaint how the Germans would inventory their spent brass after a range session. They also had a pretty slick reloading tool for the MG3 link belts, which were reusable.