The 
Nuprol NPoint HD-13 RDS Sight (Black)
 is a compact red dot sight designed primarily for airsoft replicas, including pistols and rifles. It serves as a fast-acquisition reflex optic for close-quarters engagements. 
Key Specifications & Features
SKU: 7049.
Optics: Features a crisp red dot reticle with adjustable brightness levels.
Build: Constructed with a robust metal alloy housing in a matte black finish to reduce glare.
Mounting: Integrated Picatinny/Weaver mount compatible with standard 20mm rails.
Eye Relief: Provides unlimited eye relief and a parallax-free window for distortion-free viewing.
Package Contents
Standard retail packages for the HD-13 or similar NPoint models usually include:
Red dot sight.
Lens covers (forward and rear).
Cleaning cloth and adjustment tools (Allen key).