CMMG 28B3D0CSG ENDEAVOR MK4 22ARC 20 SNGRY. CMMG 28B3D0CSG ENDEAVOR MK4 22ARC 20 SNGRY - Specifications for CMMG 28B3D0CSG ENDEAVOR MK4 22ARC 20 SNGRY: Manufacturer: CMMG Magazine Included: No CMMG 28B3D0CSG ENDEAVOR MK4 22ARC 20 SNGRY