I got the 3 from the tapco ad for it. I was not counting the pistol grip. I was reading on a forum for the sks, what you have for the chinese sks is incorrect, one of the guys that runs the board email the atf and told them. there is not a muzzle attachment shipped on my sks or look like it was not made for one.

check out what they had to say:
http://www.sksboards.com/smf/index.php?topic=27678.0