KX-5 trigger is adjustable for LOP, and the forend release is a push button on the end of the forend stock. Also, as stated above the rib posts are straight instead of angled. The price is also much more for a gun that is basically the same gun. I prefer the KS-5 Special because the receiver looks better to me. They are not so production looking. This is a really nice gun, in new condition for a fair price. This is also the latest model of the KS-5 Special. I am kind of bias though because I own and shoot one very well. I am selling the K-80 I own because I just can't shoot it as well. Jon