Fenominal rail - Daniel Defense Rail Interface System Ris III

This is genuinely the best rail I have ever installed (for a milspec AR15). Easy installation, very rigid, very well built, very durable. The only complaint I have is that the barrel nut requires it's own tool (included), but it would have been easier if DD would have made it milspec. The difference between a milspec barrel nut tool vs DDs barrel nut tool is almost impercibable. The sizing is almost identical, you can even grind a barrel nut tool and make it fit, so I don't know why not just make it milspec.