The Aero Precision EPC-9 Complete Lower Receiver is the perfect base for your custom AR9 build. This complete lower is upgraded to include a Magpul MOEA(R) Grip and MOE SLA(R) Carbine Stock. Save when you buy it complete and let our armorers do the installation for you!Features:Threaded bolt catch pin for easy installationIntegrated enlarged trigger guard to remove any risk of breaking off trigger guard tabs, and provide an overall more rugged platform to build onThreaded takedown pin detent recess to allow for the installation of a detent and spring with a single 4-40 set screwFlared magazine well for quick and easy reloadsProprietary components pre-installed from the factoryStandard AR15 takedown/pivot pin lug patternMachined from custom forged 7075-T6 aluminumCompatible with standard frame GLOCKA(R) magazinesSpecifications:EPC-9 Lower ReceiverMagpul MOEA(R) GripMagpul MOE SLA(R) Carbine StockLower Parts KitEnhanced Buffer TubeNEW EPC 8.1oz BufferAR15 Carbine Buffer SpringCastle nut/end plateThese parts are installed