General Info: Dust Doors on the AR-15/M16 platform are a barrier between the action and the elements, under constant spring pressure, the action of the bolt carrier reciprocating or being manually cycled the dust door will open up allowing ejection out of the door. During travel, the dust door can be closed and held in place with a captive detent holding it against a groove cut out in the upper receiver.
About this Dust Door: This Polymer Dust Cover is designed for AR-15s. It has a solid construction with a clean black finish.
Material: Polymer - This dust door is made from the same polymer found on the upper and lower receiver of an AR-15.
Compatibility: Standard Size Upper Receiver Door
Color / Finish: Black
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