NCStar 4 Reticle Green Dot Sight QD Mount Grenade AA battery should be used

AA battery should be used when there isn't enough sun light

They use the same mechanism that low capacity magazines use

The TRG unique rail system has both keymod side rails and standard under/top rails for accessories

Oval holes on helmet allow for ventilation

Fits in most everything

NCStar 4 Reticle Green Dot Sight QD Mount Grenade AA battery should be usedThe NCStar 4 Reticle Green Dot Sight differs from our other reflex sight offering from NCStar by featuring the option to use a green reticle instead of just red. This is an exciting change as some of our customers have wanted a green reflex sight. The selectable reticles are a bullseye, starburst, dot, and cross. Each of these options are very easy to see on all available brightness levels. Uses a CR2032 battery (included) This is the QD quick detach