The Battle Arms Authority Elite Lightweight Lower Receiver provides a unique lower for your first or next build. The unique receiver is cnc machined from 7075-T6 Aluminum and has an innovative design that makes the receiver exceptionally light weight. Compatible with Mil Standard Lower receiver parts, this receiver is sure to catch eyes. FeaturesPrecision CNC from Billet 7075-T6 Aerospace AluminumPatent Pending Lightweight DesignMIL-A-8625F, Type III, Class 2, Hard Anodized Black FinishCompatible with TDP/Mil Standard AR Lower Receiver Parts Dimensional Accuracy InspectionAll Sharp Edges De-Burred Sharp by HandPictograph Selector Markings Properly Marked for 90deg Safety or BAD-ASS-ST / BAD-CASS-ST Short Throw Ambidextrous Safety SelectorsReceiver Safety Selector Hole & Internal Wall Machined with Relief Cut for Battle Arms Development "SHORT-THROW / REVERSIBLE" Ambidextrous Safety SelectorsMulti Caliber Marking for Build VersatilityFlared, Deep Beveled Magazine wellEasy in Install S...