LE6943CK Upper, 5.56mm, Monolithic Rail
The Colt LE6943CK Monolithic Upper Assembly feature's Colt's law enforcement fully unitized URG. In addition to an uninterrupted full-length front rail, this upper receiver allows for a free-floated barrel. This LE6943CK Monolithic Upper Assembly also features a gas-block mounted front flip-up sight with bayonet lug and a flip-up rear sight. The barrel is Colt's standard 11.5" chrome lined M4 barrel with an A2 flash hider up front.
A unique and outstanding feature is the folding front sight. Unlike many folding front sights, the Colt folding front sight base is pinned in place as opposed to screwed on. Now, there is an advantage and a disadvantage to screwing in place. Both A.R.M.S. and PRI offer a front site base with set screws that allow changes for extreme windage. But, Colt has pinned the front sight base, and we like that as being more durable and permanent. Due to the pinning process, the front sight base will not loosen and adversely affect accuracy or reliability. The benefit of the folding front sight is noticeable when using optics. The standard front sight base can interfere with the view of optics when mounted on the rail of a flat top upper receiver, and the operator has an improved field of view with the front sight folded. Most optics as well will allow co-witnessing between the back-up sights and the optic in case the battery was to fail, or the optic was to become damaged. The front sight base is equipped with a bayonet lug. The Colt folding front sight is robust and positive locking.