Perfect for ruger ar556 - UTG Pro AR15 Carbine Length 7in Super Slim Free Float Handguard

If you want a slim rail for the Ruger AR556 and you want to retain the front sight post then this is the one. It is a perfect fit. The screws even come with blue thread locker pre applied so that they don’t back out. I just fitted everything hand tight but values are provided if you have a torque wrench. I also recommend purchasing a forward grip because after a few mags at the range the rail will become hot to the touch. A grip should be easy to add because rail sections are included in the box. Shipping was fast and everything arrived as advertised. I would buy the rail again if I needed the same length. When I installed the rail I used a sight base to line the receiver up with the forearm by clamping one side to the receiver and one side to the rail. I suggest that you do the same as this is a quick way to line everything up correctly. The rail is marked with designators on the top which would be helpful if my Ruger was. An installation wrench was included but I just installed it using a standard AR 15 breakdown tool.