Our billet sets are CNC machined from solid billet 7075-T6 aluminum which is 70% stronger than the commonly used 6061 aluminum and finished with milspec hardcoat anodize to a surface hardness of 60 Rockwell. We have designed our lowers with an ambidextrous bolt release with extended latch for smoother deployment. The precision machining on our billets are well known in the industry and we are excited to introduce our combo sets for your next .308 rifle build.