I'm selling my rifle. Built on a Lancer L15 ambidextrous bolt release lower with interchangeable magwell. CMMG lpk installed. Milspec buffer/tube with Magpull ACS lite stock and MOE grip. Upper is Aero Precision with a Diamond Head free float (continuous rail) with modular side and bottom rails. Some magpul rails directly fit (like ones shown in image). ARMS compact BUIS. BCM tacticool charge handle. $1100 OBO.