Aluminum and steel.What material are they made of?
They work on the ACR but guys say that they are too short for the standard AR since the rails aren't tall enough. I also have high cheek bones being part cherokee that helps me as well. So, not very tall but on the HK 416 and the ACR they work just fine. If you really want them on a standard AR you may have to get some mini risers to increase the height.I looked and didn't see anything, but how tall are these. Looking for some for the pistol that will take the heat from being suppressed, that will not affect the red dot.