Knights armament ras - Knight's Armament M4 Carbine RAS Forehand Assembly with Three 11-Rib Panels

I mounted this on a Colt 6920. I pre ordered it and five weeks later it was delivered. It was definitely worth the wait.
Mounting it was a snap. It locked up tight with no issues whatsoever. I was going to buy a used one on E bay but was concerned about authenticity. If you're serious about one of these, but from Optics Planet. You'll be getting the real deal. Most of the used and new ones on line were produced between 2006 and 2008. This one was built in 2017. It is supplied with the slotted screw for tightening the top rail. It is supplied with three (3) eleven rib rail panels with the cage code. If you have a Colt carbine this is a must have IMO.I would highly recommend this product. With Optics Planet great price and reputation, just buy it.