Yankee Hill Machine Co Dust Cover, 300 Blackout, Fits AR Rifles, Black, Includes: Dust Cover, Rod, and Retaining Clip Spring YHM-111-300 111300

YHM has long been a supplier of Caliber Marked upper receivers but we soon asked oursleves What if we want to change the caliber of that upper receiver? For this reason we now offer caliber marked dust covers for those who may end up changing the caliber of their top end/upper receiver - Assemblies Include the following: - Caliber Marked Dust Cover - Rod AND Retaining Clip - Spring