AIM EG1 Optical Red Dot Sight (Dark Earth) Net-Weight-(g)_374 this gives better clarity when

this gives better clarity when listening to incoming signals

Using HK's unique internal mechanical recoil reduction system reduces the recoil forces imparted to the weapon and shooter by as much as 30%

This kit will allow you to use almost any rail system in the market and be able to switch outer barrels at any time without the hassle of removing the rail system first

Metal Front and Rear Sight

AIM EG1 Optical Red Dot Sight (Dark Earth) Net-Weight-(g)_374 this gives better clarity whenAIM EG1 Optical Red Dot Sight (Dark Earth) Metal Construction Fit to mount on any 20mm Picatinny Rail 10 Levels of illumination Fully adjustable windage & elevation