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Compartmentalized plastic box contains the following parts:

1x Front Bolt O-Ring, 1x Rear Bolt O-Ring, 1x Buffer O-Ring, 1x Ball Latch, 1x Adaptor Nut (10-32), 1x Receiver Bolt (Long), 1x Dowel Pin (Black), 1x Pin, 1x Front Sight Spring, 1x Receiver Dowel, 1x Drive Spring, 1x Velocity Screw, 1x Feed Elbow Dowel Pin, 1x Front Sight Pin, 1x Marker Oil, 2x Grip Nut, 2x Valve Lock Screw, 2x Receiver Bolt (Short)