Aero Precision's M5 receivers are engineered to match flawlessly, providing the operator superior performance and accuracy in a durable and dependable platformUpper Receiver FeaturesPlatform: M5 (.308)Material: Machined from 7075-T6 forged aluminumCoating: Matte black hard-coat anodized Mil 8625 Type 3 Class 2M4 Feedramps.2795" takedown pin holes (DPMS size)AR 308 High Profile (.210) TangAccepts standard DPMS .308 componentsLaser engraved T-marksIncludes Port Door and Forward AssistLower Receiver FeaturesPlatform: M5 (.308)Material: Machined from 7075-T6 forged aluminumCoating: Matte black hard-coat anodized Mil 8625 Type 3 Class 2Markings: "Cal Multi"Works with standard DPMS 308 components and magazinesRear takedown pin detent hole is threaded for a 4-40 set screwBolt catch is threaded for a screw pin (no roll pin needed)Integrated trigger guardSelector markings will work with 45, 60 or 90 degree safety selectorsAccepts Battle Arms Development short throw safety sel...