PRODUCT DESCRIPTIONBattle Arms Development XIPHOS-SET: Battle Arms XIPHOS-LR: This Glock magazine compatible dedicated 9mm AR lower receiver is the perfect place to start your next PPC build.Specifications:Precision CNC from Billet 7075-T6 Aerospace AluminumPatent Pending Lightweight DesignLaser Engraved LogoMIL-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 90 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 Set Screw Bolt Catch Pin (Pin Included)Captured Takedown Pin Detent Spring (Set Screw Included)Upper/Lower Receiver Tension Screw (Screw included)Integrated Trigger GuardAll Components, material, and packaging made in the USAMRB (Magazine release block) conversion machined into the lower from factoryWeight 14.2oz