Source for accessory rail?

[gun papa]

I want to mount a foregrip on my M4. Anyone know of a source of reasonably priced Weaver rails for under the lower handguard? Thanks in advance. Papa

[mr40.cal]

if you go to bushmaster.com , click on the online catalog link, then click on handguards link, you will a find these in there, saamco m33 handguard sets for about 70 bucks, or i have hunted around for them online and found them cheaper than that. i heard that they fit even more tight and snug then the factory handguards. much better then 250 bucks for the c more guards

[chickrepelent]

GG&G makes a nice add on rail. I think I paid $40 a piece but it's been a while. If you have real M4 handguards then you have to remove the heat sheilds to install them. That can be a pain. If you have the small, standard handguards, then you just bolt them on without removing the heat sheilds.
I bought a little plastic add on rail I found at a gun show to try out. I think M&A Parts sold it too me. Don't buy one. It broke very easily.