113511 AEG-EMG-MK18-180S3R-BK-GASP
113513 AEG-EMG-MK18-180S3-1R-FDE-gasp
113515 AEG-EMG-MK18-180S3-1R-GY-gasp
113517 AEG-EMG-MK18-180S3-1R-CB-gasp