Like G. Hill just said, exactly. I used to be an armorer myself, and that was one thing that would make me fly off the handle damn quick if that weapon was not handed back to me through the cage in my arms room with the bolt locked back, muzzle pointed toward the soldier handing it back to me.
We also used to slam the butts of our M-14's down to slam the bolts forward on them, when I was in the Old Guard. It was okay until I became an armorer, then it pissed me off, because I had to replace countless buttplates, because guys were slamming them down hard outside on the parking lots outside the barracks during/before/after (take your pick) parade practice. Problem was, those things cost us $38 bucks a piece (Gov't cost, mind you), thru our supply system (I'm not joking, I'm dead serious)!
This came out of my overall budget for parts, spares, etc. Stocks also tended to get worn out a lot too. Anyway....