HK MP5 Rear Sight Drum Features The HK MP5 Rear Sight Drum is machined from steel to HK s exacting manufacturing standards ensuring a precise fit within the MP5 s rear sight housing that maintains correct rotational engagement and positive detent function through thousands of adjustment cycles. As a factory HK component it matches the original specification precisely preserving the MP5 s signature four-position rotating drum sight system that delivers rapid aperture selection for a wide range of engagement distances and lighting conditions. The matte black finish resists corrosion and maintains a clean factory-correct appearance that integrates seamlessly with the MP5 s existing sight assembly. The steel construction ensures long-term durability under sustained use and repeated adjustments without wear-related degradation in detent feel or rotational resistance keeping the drum locked firmly in each selected position. Simple to install using standard armorer tools it restores full rear sight drum function quickly and correctly without the fitment risks associated with non-factory alternatives. For MP5 owners and armorers who demand factory-correct components throughout the sight assembly this rear sight drum is the only acceptable replacement. HK MP5 Rear Sight Drum Specifications Manufacturer: Heckler and Koch Model: MP5 Rear Sight Drum Material: Steel Color: Black Firearm Fit: HK MP5