[FLT]

When did Keltec start shipping the S2K with a knurled thread protector?

 

[haugrdr]

When they first came out with the Gen2...they had the knurled thread protector.

 

[poppo]

Not sure if the OPer was talking about thread protectors in general, which was with the gen 2. But I asked a while back why there were two types - knurled and hex

https://www.thektog.org/threads/gen-2-thread-protector.267903/