Originally posted by Sagitta The KSX Super is a rebadged Ricoh (I want to say a KR-10).
Except for the badge, it identical to a Ricoh KR-10 dating to the early 1980s. It is a standard K-mount camera and should be compatible with any K-mount lens ever made that has an aperture ring. I have its big brother (Ricoh XR7) and can vouch for the general build quality. Here is a review of the KSX Super:
http://mattsclassiccameras.com/sears_ksx_super.html
In regards to the "Ricoh Pin"...the risk presents when attempting to mount a Ricoh "P" mount lens to any Pentax autofocus body. This would include most Ricoh-brand lenses made in the late 1980s as well as many third-party brands. The pin (used by Ricoh for programmed auto exposure) drops into the AF drive mechanism and effectively locks the lens to the camera...perhaps permanently. Rule of thumb...if you don't shoot Pentax AF, you have nothing to worry about. If you do shoot Pentax AF, be aware of the potential Ricoh pin hazard. As noted above, there are numerous articles devoted to detecting and dealing with the pin.
Steve