This is a precision replacement screw designed specifically for AR-15 A2 rear sight assemblies. The rear base index screw retains the elevation index assembly, ensuring your windage adjustments stay locked in place during shooting. If your A2 rear sight has lost or damaged this critical component, this genuine replacement restores full functionality to your sight system.
The A2 rear sight remains one of the most reliable iron sight systems for AR platforms. This index screw plays a critical role in the elevation adjustment mechanism. A properly functioning screw keeps your windage settings stable through extended shooting sessions. Replacement becomes necessary when the original screw strips, breaks, or goes missing during field use.
Competitive shooters depend on consistent sight adjustments. The rear base index screw must be precisely machined to maintain the tight tolerances required for accurate elevation indexing. This. Double R Armory replacement meets those exacting standards and ensures your A2 sight performs as designed.
Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.
Platform: AR-15
Component: Rear Base Index Screw
Sight Type: A2 Rear Sight Assembly
Application: Replacement Rear Sight Hardware
Function: Retains the Rear Sight Elevation Index Assembly
Construction: Threaded Steel Screw
Finish: Black
Check out our Shipping and Processing Times Check out our Warranty/Returns and Terms and Conditions Check out our State Restrictions page
