Description Colt Match Target M4 Carbine lower receiver chambered for 5.56 NATO. Partial lower with installed magazine release, bolt catch, front take down pin, safety selector, and trigger. Must ship to FFL holder. Condition: Very good with light handling wear and a couple contact marks. Could use some cleaning on the internals. Serial: MTM410133 Manufacturer: COLT Caliber: 5.56x45mm NATO Model: Match Target M4 Carbine Book# 9-753