Where can I find a durable tritium front sight for an AR15? I'm assuming that's the best iron sight solution.

I have an Aimpoint but I'd like to get familiar with an iron sight solution in low/no light shooting.

Thanks.

Quoted: Where can I find a durable tritium front sight for an AR15? I'm assuming that's the best iron sight solution. I have an Aimpoint but I'd like to get familiar with an iron sight solution in low/no light shooting. Thanks.

One option.
http://www.trijicon.com/user/parts/products1.cfm?PartID=35&back_row=2&categoryID=7

XS Sight Systems
I have the 24/7 Tritium Stripe (front post only)on 2 of my AR's. Good Stuff!!!
I like their products so well that I have one sight or another on ALL of my weapons.

My night site is an Aimpoint CompML3irons for everything else.

Oh wait, you said iron sights, sorry.  

XS Sight Systems
I have the 24/7 Tritium Stripe (front post only)on 2 of my AR's. Good Stuff!!!
I like their products so well that I have one sight or another on ALL of my weapons.

++1 for XS.  Trijicon's are just too small & hard to see.  I've put XS fronts and rear ghost rings on several AR's and fronts only on others.  Much, much better.

I use the Trijicon front sight, but I find the rear unit just about useless.  Be aware that the front is a tad wider than a standard one.  The Trijicon post is able to move independent of the base, which allows the tritium element/dot  to remain faced toward the shooter on each elevation adjustment.  Many similar units require you to rotate the unit a full 360 to have the dot orientated back toward the shooter.  This makes it difficult to fine-tune your zero, if you just need a click or two of adjustment.