Mine allows lockout as a part of the threads inside the tailcap is anodized, Is yours the same, UnknownVT?
You have the latest version.
All my tactical Quarks are earlier and do not have the anodizing on the threads.
Perhaps you can please help to clarify -
is the anodizing on the inside of the tail cap only,
or is there anodizing on the corresponding threads on the body tube too?