Do they make any rails to put on standard black handguards?

A buddy has an ar with just stock handguards with heatshields. Are there any rails he can put on through the holes in the top or bottom so he can mount a few things?

If so, do you know where I can find them?

Thanks.

Here is one option:
http://www.brownells.com/.aspx/pid=41045/Product/AR-15-M16-UNDER-FOREARM-INTEGRATED-RAIL

I think Yankee Hill Machine also makes this type of rail - at least they used to.

Try here…

http://www.impactweaponscomponents.com/

Here’s another
http://www.houtsenterprises.com/product3146.htmlPASGT

G.G.&G makes one I think.

Eliminate the rail section and get an IWC part.

www.impactweaponscomponents.com

MOE handguards are cheap and have rail sections to mount anything you want.

I know its not exactly what your asking about, but its inexpensive and a more sturdy option then standard handguards imo

Big +1 on the Magpul MOE handguards and Magpul rails.

Thanks for all the great replies.

Here is another option for a rail mounted on the bayonet lug

http://customdefensiveproducts.com/product/AR15/BLAM2.html