The K9 was developed by the Noveske Shooting Team to address the problem with shooting off, through, and around flimsy or otherwise non sturdy barricades. The K9 also is very effective when used in port windows and doorways. Through stage design and course of fire (COF) freestyle rifle shooting is made more difficult by dictating which targets can be engaged through which ports and over what barricades. To add to the problem, ports are generally too low to kneel and too high to go prone and more often then not, too frail and inadequate to take shots out past 200 yards with any confidence.
Another problem when bracing up against a barricade is the shooter must readjust the support grip and pinch the wall and forearm together to steady the rifle. This must be practiced against every style of barricade and material thickness presented in order to become proficient.
The K9 addresses these problems quickly and effectively. When used as a brace or support the "teeth" bite into the barricades or ports positively allowing faster follow up shots. When anchored into a support structure, awkward positions are no longer an issue as the rifle is now solid and the flimsy barricade can now be pushed into position for steadier shots.
The K9 also takes care of the problem with readjusting the support grip. The forward facing teeth allow the shooter to push the rifle into position without ever removing the grip on the forearm and start taking shots as soon as the sights are aligned.