Quote Originally Posted by jbtamu1011 View Post
What length screws are people using to attach the foregrip?

Ok so the threads are approx. 1/2" deep on the foregrip. I would stay off that number alittle so call it 3/8"

Then you need to get the thickness of your rails material under the screws. Typically but not always approx. 1/8".

So you should be ok with a screw that is 1/2" long if your rail is the same. Even if its slightly different you should be ok.