From Dave's Facebook page:
The CAP-PA (precision accuracy) sight is now available at the Handgun Combatives Store. This sight was developed based on customer requests for a sight that was highly visible, but offered increased accuracy potential for longer shots.
The .123 front has been paired with a .130 rear to reduce any "play" in the sight picture, but is wide enough, due to the sight radius, to find quickly. The narrow rear window gives the visual impression of a "taller" sight but without adding height to what is intended to be a combative concealed pistol sight. The rear is flat black so there is nothing to distract the eye from looking through the rear to the front...a recommendation of a eye surgeon we have worked with in the past. The rear sight is also the traditional 9mm/.40 rear sight height so rounds will impact at the top edge of the front sight instead of the "cover what you want to hit" impact of the standard CAP.
I have seen many students pair a narrow front sight with a wide rear and really struggle hitting what they are shooting at. Many tell me they are under the impression the eye will "automatically center" the front sight in the rear notch and when this does not happen like the expect, become frustrated. Keep in mind, 1/16th inch of muzzle movement will be 4 inches at 20 feet, thus, a narrower rear sight will help reduce this alignment problem. I really wish that all of the things the "experts" tell us will happen "naturally" really did...
The front has the safety chartreuse front sight square for the classic "square in a square" flash sight picture the CAP was originally designed to offer. There is also a tritium bead in the center of the square. While not perfect (anything that tries to cover a wide variety of needs seldom is) the CAP-PA does offer more precision at longer distances while remaining a useful close quarter sight system.