[L473ncy]

I was actually doing some research on the KSC Mk 23. I actually picked one up (unknown version as of now). If anyone knows Oates76 and what version his KSC Mk 23 was PM me or post here.

Anyways, there are 4 versions essentially:

You've got them divided into 2 main versions the pre 2005 (old) and post 2005 ("new type") versions.

The old ABS version is the first gen (pre 2005)

05 Hardkick ABS version
05 Hardkick heavyweight

There is also the "Limited Edition" Heavy Weight Prototype Phase II version. I don't have any more information about it but I'm led to believe that it's a pre 2005 version.

It's definitely a neat gun, I haven't actually played with it yet (at the gun docs ATM) but something you should do is replace parts 65, and 66 and also the trigger return spring.