I think most made 2007 and before had that old linerlock. During the development of the Soldier M2008 they determined changes were needed, and enlarged and beefed up the lock. My Fireman, which came in a box with 2007-dated owner's guide has the old, low profile lock. Not as easy to release the lock with gloves on, but it is more comfortable for extended use. And might I add, I bought the knife new out of the Victorinox case from a local cutlery store in 2016--for less money than a Trekker!
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Hi Cody and thank you for the information. Is your fireman red? I have a red one. With lower lockliner profile. I agree that it is more comfortable than the new linerlock.