Luth-AR A2 Rear Sight Assembly Kit - Black, Model UR-21K

Overview

The Luth-AR A2 Rear Sight Assembly Kit (Model UR-21K) is a professional-grade, complete kit designed for mounting on AR-15 A2 upper receivers. This kit provides all necessary components for a secure and durable rear sight setup, including the rear base lug, sight aperture, flat spring, windage knob, and associated hardware such as springs, ball bearings, and elevation index. Crafted for shooters who demand mil-spec accuracy and repeatability, the components are precision-machined to tight tolerances to resist zero shift during firing. The windage adjustment mechanism allows for repeatable 1/4-inch click adjustments at 100 yards, and the aperture design enhances sight picture definition. The kit features a sleek black finish and requires basic mechanical assembly, making it suitable for both building a rifle from scratch and upgrading an existing platform.

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