"This barrel extension is great! It is bigger than I expected and it looks amazing on my CYMA CM028 AK47. It has both Counter Clockwise and Clockwise threads. The ends that twist on to your gun actually twist off of the main body of the barrel extension. This is a bit awkward if your gun has Counter Clockwise threads because the barrel extension twists clockwise to separate from the end piece that twists onto your gun. So if you try to tighten one piece, the other will come loose if you do not hold it. But it does not make any hinderance to the barrel extension being mounted on the gun! All in all I give this piece a 5/5 on quality, structure (metal), and AWESOME look. Buy it!!!"