Added the finishing touch to my KAC build – an FCC AAC style flash hider.
It took me about an hour to time the bloody thing. I started by using thin shims – the kind you get with G&P hiders. However, I discovered a PTS crush washer and O-ring in my spares box…which reduced the job to five minutes. I must see if I can source some more as they really take the hassle out of getting the elusive 12 O’clock position.