These lowers are made using the most advanced aerospace manufacturing technology to produce the industries finest, forged Mil-Spec lowers. Our receivers are machined on a multimillion dollar, automated, manufacturing system which enables us to produce a product of unequaled quality and value. 

These forged lowers are quality made using material is 7075-T6 and are marked "CAL MULTI" to accommodate most builds.  Finish is Black Hardcoat Anodize per MIL-8625 Type 3 class 2.

Fire selector is marked "Safe" and "Fire".  This is a "high shelf" lower.