BAD556 Ambidextrous Lightweight Billet Lower Receiver in 7075-T6 Aircraft Grade Aluminum. Precision CNC from Billet 7075-T6 Aerospace Aluminum. Patent Pending Lightweight Design. Laser Engraved Logo. MIL-A-8625F, Type III, Class 2, Hard Anodized Black Finish. Compatible with TDP/Mil Standard AR Lower Receiver Parts. Dimensional Accuracy Inspection. All Sharp Edges De-Burred Sharp by Hand. Pictograph Selector Markings Properly Marked for 90 degree Safety or BAD-ASS-ST / BAD-CASS-ST Short Throw Ambidextrous Safety Selectors. Receiver Safety Selector Hole & Internal Wall Machined with Relief Cut for Battle Arms Development "SHORT-THROW / REVERSIBLE" Ambidextrous Safety Selectors.