A prism scope (sometimes also referred to as a prismatic scope) is a scope that uses a glass prism to focus an image as opposed to traditional rifle scopes which use a series of lenses. 

This allows for a more compact design while still allowing for many of the same benefits such as a magnified image, an etched reticle, reticle illumination, and a focusing eyepiece. See bottom of listing for pros and cons of prism scopes.

Features

Crystal clear prism scope w/ fully multi coated prism offers distortion free & edge-to edge image

• Compact only 5.5 Inches in length
• 11 Step intensity etched BDC type reticle calibrated for 223 - Black when off, Red when on.
• BDC Reticle Directly Etched On The Prism Provides Hover & Ranging Reference From 0-500 Yards

Integral Picatinny Mount (may not fit er weaver bases due to cross lock width and spacing)

• 3 inch Eye Relief
• Wide field of view for fast target acquisition at medium/close ranges

More suitable for shooters with astigmatism than conventional red dots

• IPX6 Waterproof
• Heavy duty rugged aluminum housing

An absolute MUST for your fast target acquisition in close to medium range shooting

Specs

• Magnification: 3x
• Objective Lens: 32mm
• Exit Pupil: 10-8mm
• Optical Coating: Fully multi-coated
• Field of View: >6.5°
• Field of View: 11.39m @ 100 meters
• Eye Relief: 76mm / 3.0 inch
• Click Value: 1/2MOA
• Elevation Range: 90MOA
• Windage Range: 90MOA
• Length: 140mm / 5.5 inch
• Weight: 435g / 15.4oz
• Reticle: Etched VEP-CDB
• Parallax Setting: 100 yards
• Finish: Black matte
• Illumination: 11 levels Red
• Battery: CR2032
• Shockproof and fog proof (nitrogen filled)
• High-quality aluminium alloy in durable black matte finish
• Fast focus eyepiece at ocular lens adjustment -2 to 2
• Integrated Mount for 21mm Picatinny rail

Accessories include: flip-up caps, hex keys and a cleaning cloth

Prism scopes - Pros and Cons

Key advantages of a prism scope over a red dot sight:

Allows for magnification giving you a larger sight picture and extending your effective range.

Features an illuminated reticle system and an etched reticle. The etched reticle can be viewed without batteries or worry about fiber optic issues.

The prism give the user a brighter and very sharp image, giving you quicker target acquisition times.

They feature a diapoter that can be adjusted for personal differences in vision. This makes it a good option for people with astigmatism or other eyesight conditions that make using red dot sights difficult. (no fuzzy or star red dot views)

Disadvantages of a prism scope versus a red dot sight:
A prism scope has a shorter eye relief that a red dot sight. This might be an issue for shooters of firearms that require extra long eye relief.

Some prism scopes with magnification have the same parallax issues as magnified rifle scopes.