Duane Dieter MOD CQD

[Rayblocker]

Found this beautiful knife stuck in the mud. Amazingly little rust except for the lock and internal components I'm guessing. Soaked it in wd40 and the blade opens but doesn't lock open and I'm unable to get the screws holding it together out. Any ideas? I'd be willing to send it out depending on cost. Just paid for fish hook removal from my dogs stomach so it may have to wait. Btw. I'm brand new here. Thanks for any help that you folks can provide.