5KU 12" Full Length Rail Segment for Keymod Handguards - Black

"great rail the screws however are hex so a flat or phileps screw wont work. They look great though.

"This is a great rail segment. i installed it on my 13" urx4 rail and it looks beautiful! its very easy to install, it took less then 1min (after i found the right hexkey). it comes in a plastic bag with all the screws in a separate smaller bag. you simply screw the screws into the bottom of the rail, and then put them through the keymod holes and slide it forward till you feel/hear it click into place. once its seated forward all the way, simply screw the screws tight using a size 2 hexkey/allen key to tighten down the screws. overall i like it. if you are looking for this size rail, buy it!

"It was a bit confusing to install, and for a while I thought maybe it just didn't fit my gun. The screws are designed to be tightened from the bottom, not the head, with a hex key, and without being loosened beforehand, the screws will not slide into the rail.

What you have to do is loosen the screws up as much as you can, slide the rail into the handguard, then tighten them using a hex key.

Now that I got it on, it works perfectly and I actually prefer holding this rail to the bare handguard. Of course, I'm also putting a foregrip on it in a few days...