That reminds me, Tac, the hop unit of my AKS74U has died. I didnmt actually break it, it just fell apart once I had the screws undone. I think that the years of vibration have cause 'plastic fatigue' (it was well used when i got it and i haven't shown it any mercy + this is the 1s time i've managed to break it down, so it's had precious little maintenance).
Also its selector plate was jammed, so I replaced it. Could have refurbed i think, but i'd bought the poxy plate expecting worse, so i tthought i may as well. Time to also upgrade to 6.02mm barrel, 105 spring, aluminium piston head, copper shims, Systema Energy hop rubber, and buckets of Teflon grease...