Made for the .223 Remington/5.56mm NATO cartridge with a 55 grain polymer tipped bullet.

Specifications and Features:
Nikon M-223 riflescope
3-12x magnification
42mm objective lens
BDC 600 reticle
1/4 MOA
33.6 ' to 8.4' field of view at 100 yards
14mm to 3.5mm exit pupil
4" to 3.7" eye relief
49.3mm objective O.D.
44mm eyepiece O.D.
60 MOA max internal adjustment
50 yards to infinity parallax setting
ARD sunshade
1" tube
Waterproof, fogproof, and shockproof
Nitrogen filled and O-ring sealed
Rapid action turret technology
Ultra ClearCoat optical system
95% light transmission
Eye box technology
Four time zoom range
Smooth zoom control
One piece main body tube
Matte finish
13.1" long
19.93 ounces