Melted barrels, throat erosion, clogged gas system. All in one day (ha!). The M-60 was a serviceable GPMG, however, considering what they replaced with it (Browning 30 cals) they could have designed a better system.
About field stripping, yeah it was easy! Had a guy in our company who would do it blind folded. Took about 30 seconds longer than it would normally, something like 2:30-2:45. Bn CSM (a notorious hard ass, as they all should be!) caught him doing once in a tent during a warfighter. Next thing you knew it was a Bn CTT station.