The Heckler & Koch MP5 Rear Sight Drum (brand part no. 201542) is the genuine, German-manufactured rotating diopter sight used on factory MP5 and SP5 platforms. Machined from steel and finished in black, this drum replaces a worn or damaged original and restores the MP5’s signature four-position rotating rear sight, letting shooters dial in the right aperture for the range and light conditions in front of them. It is built to the same tolerances as the sight HK ships on new guns, so fit and function match factory specification rather than an aftermarket approximation. Whether outfitting a genuine MP5/SP5, a registered transferable, or a compatible MP5-pattern clone, this drum gives shooters back the precise, repeatable rear sight the platform was designed around.

Key Specifications

• Machined from steel and manufactured in Germany to genuine HK factory tolerances.
• Finished in black to match the factory MP5 rear sight assembly.
• Rotates through four aperture positions, numbered 0 through 3, for different ranges and lighting conditions.
• Fits MP5, SP5, MP5K, and SP5K platforms, as well as compatible MP5-pattern clones using the same rear sight base.
• Drum clicks into each aperture position with a positive detent, so the setting stays put under recoil.

Frequently Asked Questions

How many aperture settings does the drum have? Four rotating positions, numbered 0 through 3, for different distances and lighting.

Will this fit an MP5 clone? Yes, it fits genuine HK MP5/SP5 platforms as well as compatible MP5-pattern clones that use the same rear sight base.

Buy the Heckler & Koch MP5 Rear Sight Drum

Replace a worn drum or bring a clone build up to genuine HK spec with this factory rear sight. Shop the full Heckler & Koch lineup of gun sights and have it shipped straight to your door.