Black folding knife with a thin, pointed blade and an orange thumb stud on the blade for opening. The handle has a clip on one side and visible screws near the pivot. The knife is shown in a partially open position.
From the top you can see that rear tab sits right on top of the crossbar lock.
CJRB

With the Bolt, you can still use those tabs and a flick of the wrist to deploy and return the blade to its handle. 

For the former, you can also use the de riguer method for this type of lock, ambidextrous thumb studs.

In practice it looks nearly identical to the motion you would use with a rear flipper, though what you are actually doing is rather different.

However, the Bolt introduces an additional option derived from a brainchild of Demko Knives, the Shark-Lock. It’s a small, jutting, jimped tab on the back of the knife, near the top of the handle, where you typically find a rear flipper.

But instead of being part of the blade, this tab is attached to the crossbar itself. This means that rather than sliding the side tabs with a thumb and forefinger, you can simply pull this one down with a single finger and flick your wrist to deploy the blade — reversing the motion to retract, of course.