The M-60 wasn't so bad, except lugging it around the hills of Korea at night in a blizzard at -25F, with a 250 round pack of ammo on your chest, four grenades, a .45, two extra magazines for that, a couple of claymore mines, and six quarter-pound blocks of TNT does not make for a happy hiker. Especially when you're afraid that if you sneeze you'll explode.