John Veit, the point-shooting guy who’d like you to shoot a pistol with your second finger unless it’s a 1911 (see: index finger platform in pictures below), writes: At close quarters, a Halo Luminous Sight is faster and easier to use than the sights. With it you get automatic and correct sight alignment, and automatic and correct sight placement. [Ed: not to mention automatic and correct sight placement.] To use it, the tube is brought to eye level, and aligned left – right – up – down, until the inner walls of the tube are not visible and the halo affect appears . . .
The aligning process is amazingly easy and fast, and is effective when targeting both stationary and moving objects. Note that in the pic showing the halo affect, the front sight is a bit high. But a 21 feet or so, where most all armed confrontations occur, you would still be in the black.
How it works:
The tube is the core of a Velcro hair roller and has a length of about 2.5 in., and a diameter of about .75 in. (6.5 cm x 2 cm), and a wall thickness of about 1/16th inch (2 mm).
The openings in the tube’s wall allow light into the tube, which illuminates the portion of tube’s wall that can be seen when aiming and the tube is not inline with a target.
The light also produces the halo affect when the tube is inline with a target by illuminating the small and uniform portion of the wall that can be seen when the tube is inline with the target.
You can “roll your own” at you own risk and expense. The tube is attached inline with the sights and/or bore, and a strip of double sided adhesive tape can be used for that.
Very High Bond tape, or a stronger bonding material should be used to prevent the tube from coming loose when shooting a firearm with a slide. The plastic is strong, flexible and very light. Test firings should be made to see how it works with your gun. It may be a good idea to have a gun-smith do the install work for you.
Always use common sense and safe gun handling practices.