Yankee Hill YHM DUST COVER ASSY Caliber Marked 9mm
Product Features: YHM has long been a supplier of Caliber Marked upper receivers, but we soon asked ourselves "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.
Specifications Assemblies Include the following:
9mm Caliber Marked Dust Cover Rod AND Retaining Clip Spring
No more dangerous mix-ups on what gun is chambered in.