The Yankee Hill Machine YHM Dust Cover Assembly is a caliber-marked dust cover for AR-style rifles, marked 9mm. It is constructed from steel and supplied as a complete assembly for the upper receiver. The package includes the dust cover, rod, retaining clip, and spring for installation. This assembly is intended for users who replace worn components or change calibers on compatible AR uppers.
Key Specifications
- Material is STEEL.
- Caliber is marked as 9mm.
- Fit is specified for AR Rifles.
- Product type is a Dust Cover.
- Overall dimensions are 0.30 X 3.10 X 5.05.
- Height is 0.3000.
- Width is 3.1000.
- Length is 5.0500.
- Weight is listed as .06.
- Included components are rod, retaining clip, and spring.
A straightforward, caliber-marked replacement for AR-style uppers, this YHM dust cover assembly delivers durable steel construction and the needed hardware for installation. Its complete kit format simplifies maintenance and caliber conversion tasks while providing dependable ejection port coverage in everyday use.





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