AR Stripped Upper/Lower Receiver Set Features The Battle Arms Development Lightweight Ambi AR-15 Upper and Lower Receiver Set will give your next AR build a unique and ultra-modern look. The relief cuts look great and reduce weight without reducing performance. The pictograph selector markings are properly marked for 90-degree or BAD-ASS-ST / BAD-CASS-ST Short Throw Ambidextrous Safety Selectors. The receiver safety selector hole and internal wall have been machined with relief cuts for the Battle Arms Development SHORT-THROW / REVERSIBLE Ambidextrous Safety Selectors. The ambidextrous mechanisms for the bolt release and magazine release are pre-installed into the lower. An integrated trigger guard and flared deep-beveled magazine well complete the modern look of the lower. AR Stripped Upper/Lower Receiver Set Specifications AR-15 Ambidextrous Upper and Lower Receiver Set Multi-Caliber Marked Patent-Pending Lightweight Design Precision CNC Machined Billet 7075-T6 Aerospace Aluminum Laser Engraved Logo Compatible with TDP/Mil Standard AR Lower Receiver Parts All Sharp Edges Deburred by Hand Pictograph Selector Markings for 90-degree Safety or BAD Short Throw Selectors Receiver Selector Hole Machined for BAD SHORT-THROW/REVERSIBLE Ambi Selectors Flared Deep Beveled Magazine Well Easy Install Set Screw Bolt Catch Pin Upper/Lower Receiver Tension Screw Integrated Trigger Guard Built-In Ambidextrous Bolt Release and Magazine Release MIL-A-8625F Type III Class 2 Hard Anodized Black Finish All Components Material and Packaging Made in the USA