Hi! Haven't seen another Marylander in a while.
Alright so here's the deal with autos. All knives are covered under just two statutes in Maryland: Criminal Code
4-101 and
4-105. 4-105 is the auto law and both defines them and prohibits
sale of them, but does not prohibit anything else. The definition goes "a knife or a penknife having a blade that opens automatically by hand pressure applied to a button, spring, or other device in the handle of the knife, commonly called a switchblade knife or a switchblade penknife." This prohibits both OTF and side-opening switchblades, so yes all "full auto" knives are regulated. However, it does not prohibit "assisted opening" knives due to a loophole in how the law phrases it ("device in the handle of the knife") which means it has to have a button of some kind. Hence you will see assisted openers for sale in any store that sells knives.
There are some things to keep in mind though. 4-105 only prohibits
sale, not ownership or carry. 4-101, the general weapon carry statutes, does prohibit concealed carry of autos, but
open carry for all weapons exception handguns is still legal, even for autos. Be warned that Baltimore city code prohibits even mere ownership of autos, this this goes largely unenforced.
Your Buck 110 being a non-auto folding knife falls within a special exception of 4-101. It is a "penknife" and thus exempt from the law entirely. Carry it however the heck you want, even completely concealed, it is legal. There is no length limit. Do not anyone tell you otherwise, even a cop. There was case in 2002 of a cop losing his badge because he insisted a folder was a "weapon" and arrested a guy anyway.