LUTH-AR UR-21A A1 Rear Sight Base Assembly 859992007135

The LUTH-AR UR-21A is a precision-manufactured A1-style rear sight base assembly designed for AR-15 and M16 platform rifles. This rear sight base provides a solid foundation for mounting adjustable rear sights, offering shooters a classic A1 configuration with modern manufacturing quality. It is an excellent choice for custom builds, restorations, or upgrades where an authentic A1 rear sight setup is desired.

LUTH-AR is known for producing high-quality AR-15 components that combine traditional designs with reliable construction. The UR-21A Rear Base Sight Assembly is machined to exacting tolerances to ensure proper fitment on standard upper receivers. This component is ideal for builders looking to achieve the classic A1 look while maintaining the durability and precision expected from modern AR parts.

Key Features of the LUTH-AR UR-21A A1 Rear Sight Base

• A1 Style Design – Classic rear sight base configuration.
• Precision Machined – Manufactured for accurate fit and function.
• AR-15 Compatible – Fits standard AR-15 and M16 upper receivers.
• Durable Construction – Built for long-term reliability.
• Model UR-21A – Official LUTH-AR rear sight base assembly.

The LUTH-AR UR-21A A1 Rear Sight Base Assembly is engineered to provide a stable and accurate mounting platform for rear sights on AR-15 rifles. The A1-style design offers the traditional look and functionality that many shooters prefer, particularly those building retro or classic-style rifles. The precision machining ensures that the sight base aligns properly with the upper receiver for consistent and reliable sight alignment.

This rear sight base is well-suited for custom rifle builds, historical restorations, and shooters who want the classic A1 rear sight experience. Whether you are assembling a retro M16-style rifle or upgrading an existing AR-15 with traditional components, the UR-21A delivers the quality and fitment needed for a professional result. Its durable construction ensures it can withstand regular use and maintain zero over time.

Experience the quality of LUTH-AR components. The UR-21A A1 Rear Sight Base Assembly provides a reliable and authentic solution for your AR-15 build.