Dd A1.5 Fixed Rear Sight

The Daniel Defense A1.5 Fixed Rear Sight is a streamlined backup iron sight designed for operators running modern reflex optics on AR-platform rifles. This lightweight fixed rear sight combines proven A1-style sight geometry with a compact profile that doesn't interfere with charging handle manipulation on M4-type upper receivers, making it an ideal secondary aiming solution when your primary optic fails or requires co-witnessing with iron sights.

Construction features a one-piece machined design that mounts directly to any military-specification flattop upper receiver using a slotted fastener threaded into a self-locking steel insert. This approach eliminates wobble and maintains zero while keeping installation straightforward—no special tools or gunsmithing required. The sight weighs just 0.19 pounds, contributing negligible mass while providing rock-solid backup functionality. Its compact footprint (2.25 x 1.5 x 4.25 inches) positions it low enough to clear most optic magnification housings, allowing cowitness capability without sacrificing sight picture through primary glass.

This rear sight suits patrol rifles, entry weapons, duty carbines, and training platforms where redundant aiming capability matters. Law enforcement and military operators frequently pair this sight with red dots, ACOGs, or LPVOs to maintain emergency aiming reference. It's also popular among civilian shooters building patrol-ready or duty-grade carbines who want reliability without the weight of alternative backup systems.

Daniel Defense rear sights have earned consistent adoption across professional end-users due to proven durability and predictable performance. The A1.5 configuration balances classic sight radius principles with modern optic-ready carbine ergonomics, making it a no-compromise choice for shooters who understand that iron sights remain essential safety equipment despite optical advances.