So much for High Dollar Rifles

Got to watch a Sig556 disassemble itself on the line at class today. 25 rounds into the morning and the bolt handle took a flight along with an op rod failure as well. Not a pretty sight. Student had a back up gun and continued class with that without further problem.
Had a very good class that picked up concepts well and shot very well. Scenarios in the "house" went interesting as usual. Had a number of the usual responses and a lively discussion afterwards ab0ut justifiable use of force.