How much experience do you have with the s2k? Are you aware of the internal workings? The sub is a different animal and I take down my firearms all the time, whether it be for cleaning or parts install, I have never had any issues with it, there is little to no risk (if you are competent with a screw driver) to replace the grip halves, and I’m quite certain if you don’t feel secure doing it yourself, keltec will do it for you for a small fee, they will even install the mcarbo parts for you, that’s why I like keltec, they don’t really have a stick up their butts about upgrading parts. If you do happen to do something wrong, you can get the parts directly from keltec as long as you don’t destroy or mangle the bolt tube (which is the serialized part) and the barrel, apparently if you contact keltec, they will refer you to the manufacturer of said barrel. It is very low risk and if you happen to mess up or have something wrong, I’m sure you can get an answer here.