Product Overview
The Daniel Defense A1.5 Fixed Rear Sight provides a robust and dependable backup sighting solution specifically engineered for M4-type rifle platforms equipped with primary tactical optics. Its design prioritizes operational readiness and consistent performance in demanding environments, integrating seamlessly into existing weapon systems.
Key Features
Construction & Durability
- Constructed from a single piece, the A1.5 Fixed Rear Sight exhibits superior structural integrity under dynamic conditions.
- Features a durable black hardcoat anodization, providing exceptional resistance to corrosion and abrasion, ensuring longevity in varied operational settings.
- The lightweight, streamlined profile maintains clear access to the charging handle, preserving critical operational ergonomics without impeding function.
Precision & Utility
- Establishes an absolute co-witness height, ensuring a usable sight picture through a primary optic and facilitating rapid transition.
- Incorporates a dual aperture system: a precise 0.070″ small aperture for refined aiming at extended ranges, and a wider 0.200″ aperture for rapid target acquisition in close-quarters or high-stress scenarios.
Mounting & Zero Retention
- Designed for straightforward direct attachment to any Mil-Spec flattop upper receiver.
- Utilizes Daniel Defense’s Patented Rock and Lock Attachment Technology, featuring a slotted fastener that threads into a self-locking steel insert. This robust system mitigates movement and ensures consistent zero retention, critical for maintaining accuracy.
Technical Specifications
- Product Name: Daniel Defense A1.5 Fixed Rear Sight
- SKU: RSR|DD19-064-11002
- Mounting System: Mil-Spec 1913 Picatinny Rail
- Co-witness Height: Absolute
- Rear Sight Aperture: Dual (0.070″ small, 0.200″ large)
- Finish: Black Hardcoat Anodized
- Construction: Single-piece design
- Compatibility: M4-type Mil-Spec flattop upper receivers









