YHM is proud to offer our first billet lower receiver. We originally designed a Billet lower that mimicked a standard (forged) lower receiver, but after seeing the prototype production we decided to go with a receiver that was more stylized, something that didn't look like every other AR-15 on the planet. It was this mindset that helped us arrive at the Model-57, and in turn this lower receiver. Features: These lowers were designed, and are machined 100% in house from 7075 T6 aluminum (billet) Over sized magazine well chambers for easier magazine changes Accepts all generations of PMAG's Accepts Mil-Spec upper receivers Built-in oversized machined trigger guard Fits all standard parts (except for a trigger guard) Hardcoat anodized matte black to military specifications or better This lower still fits, and functions with your standard upper receivers Tension screw built into lower for unmatched mate with any Mil-Spec upper #html-body [data-pb-style="62DF82884D58B"]{justify-content: flex-start; display: flex; flex-direction: column; background-position: left top; background-size: cover; background-repeat: no-repeat; background-attachment: scroll; border-style: none; border-width: 1px; border-radius: 0px; margin: 0px 0px 10px; padding: 10px;}#html-body [data-pb-style="62DF82884D598"]{border-style: none; border-width: 1px; border-radius: 0px; margin: 0px; padding: 0px;}