Billet 2055 lithium/aluminum ar-15 upper receiver
Type III hardcoat anodized
Weighs 5.8 oz
Advanced lithium/aluminum alloy is lighter, stronger, more rigid, & has greater corrosion resistance than standard 7075 T6 aluminum
V Seven recommends all pins, springs, screws, & components to be installed with a quality lubricating oil/grease.
Enlightened 2055 upper is not compatible with geissele mk8 rails without minor fitting of the rail to the upper.