Looking to build the lightest AR-15 possible? Well this might be right up your alley. Aero Precision posted a picture of their skeletonized AR-15 lower on their Facebook page to see how much interest there was in such a lower. It’s machined from 7075-T6 forged aluminum and will work with all standard AR magazines and components. How light is it? According to Aero Precision their skeletonized lower is just .357lbs vs .526lbs for their standard lower, a 32% reduction in weight. According to this Aero Precision product page they may retail for $150 if they actually make them. Aero Precision even posted a video of their prototype lower showing it functioning after being covered in gravel. Thoughts?