Don't try to "flick" it open. Just practice using the knob on the blade. CKRT makes knives, including different version of the M-16, with a spring loaded assist feature. The spring kicks in after you open the blade by about 25%.
They're pretty cool, but you still need to be comfortable with getting it open with your thumb.
I've had the old version of the M-16 for years, it's cut tons of rope, wire, and cardboard. Nice knife.