http://www.youtube.com/watch?v=6mNnUjPveao&feature=player_embedded
The beginning shows how to get the triangle sight off and delta ring. For a KWA, what I did was:
1. Remove rear body pin
2. Remove inner barrel and hopup
3. Re-insert body pin.
4. Unscrew the long part of the outer barrel (not if you have the CQBR)
5. Using small allen wrench or screwdriver, punch out the two triangle sight pins and sling mount pins (this is hard due to the pins being hollow so they push against the edges of the holes they are in, just hammer hard, and KEEP THE HANDGUARDS ON! I bent the ring next to the triangle sight becuase the gun was resting on it while I was pounding away)
6. There is no set screw under the triangle sight, so ignore that part.
7. Remove hanguards, then slide the triangle sight down the barrel, the gas tube is attached to it.
8. Remove delta ring.
Hope this helps!
So long as there are men, there will be wars.
-Albert Einstein