G3 Rear Sight Cylinder

G3 Rotary Sight Drum

This is the rear sight cylinder from the G3, the 7.62x51mm NATO battle rifle issued to the West German Army from the 1960s. It is the rotating drum that sits in the rear sight housing and gives the rifle its four range settings. It suits G3 and HK91 owners rebuilding or completing a rear sight, and collectors who want the correct German Army part.

Features

• Four-Position Rotary Drum — Turning the cylinder brings one of four sighting apertures into line, and each position is numbered 1 to 4 in yellow on the outer face.
• Open V-Notch Setting — Position 1 is an open notch for close range and low light, when a small peep hole would cut out too much of the view.
• Three Diopter Apertures — Positions 2, 3 and 4 are diopters, small peep holes that center your eye behind the sight, calibrated for 200, 300 and 400 meters.
• Knurled Grip Band — A crosshatch knurl around the upper edge gives your fingers purchase when you rotate the drum between settings.
• Threaded Steel Body — The cylinder is machined from steel with fine threads cut through its bore and a dark blackened finish outside.
• Detent Positioning — The drum works with the sight's detent and spring, a small spring-loaded catch that holds it firmly at each numbered setting.
• G3 And HK91 Fit — It is made for the G3 rear sight housing and also suits the HK91 and similar HK rifles built on the same sight design.
• German Army Issue — This is an original Bundeswehr part from the G3 program, not an aftermarket copy.

Bundeswehr Specification

The G3 rear sight uses this drum to choose the range setting, while windage and elevation are adjusted with tools at the sight base and housing. The cylinder is held in the housing by a clamping screw, so check that your rifle has the standard G3-pattern rear sight before ordering. As an issued part it matches the original specification exactly, which is what matters for a correct restoration.