This is a Hogue Folding Knife known as the X5, model 34550.
The X5 flipper blade has a 4" spear point blade with tumbled finish and black aluminum frame.
Features:
Push Button Lock with Manual Safety
Matte Black 6061-T6 Hard Anodized Aluminum Scales
Ambidextrous - Right or Left Handed, Tip Up Deep Pocket Carry
Lanyard Hole