That's the "Goshdarn Hacksite Mk4".
The Mk5 has been built by a local machinist but not installed yet - been too busy during election season. Once I get it on, it will need new leather that covers the sights - because I'm not allowed to post pics or show it off. It uses design elements Tim Sheehan invented but hasn't actually used yet
. Kinda like how next year's Corvette is road-tested wrapped at least partially in cardboard
.
But seriously. Tim has come up with something genuinely new.
Think of it this way. Starting in the '50s Jack Weaver came up with a change in how you shoot a gun with sights, moving away from the old target shooting system and moving towards a combat-oriented use of the sights. Cooper and all those other guys followed. But they were all still using target sights. Three-dots and tritiums and the like tried to move away from pure target sights but really, didn't move far enough away.
Tim Sheehan has come up with the next step away from target-oriented sighted fire to to combat-oriented, without diverting into electronics along the way.
Now, there's somebody else even better known in gunnie circles who is also barking up the target-focus tree. Gabe Suarez. But here's where he's going:
http://www.m4carbine.net/showthread.php?p=620163 - don't worry about the text, just look at the pics.
He's advocating small electronic sights, but because they're not totally reliable he's advocating a second set of plain black iron sights set radically tall so they can be seen right through the glass.
The net complexity of THAT system hardly needs commentary. You use the glass sight target-focus but the iron sights front-sight-focus. And if the glass fogs up bad enough you might still find yourself hosed. Plus your front sight is so tall you get holster compatibility issues even with holsters where the electronic sight fits.
Tim's system gives you a target-focus hold, easy use of both eyes and all the rest of the advantages of red dots without the complexity and mess (and holster compatibility problems!!!) of the sort of thing Gabe advocates.