The Marine Semi-Auto Combat Shotgun Technical Manual: The Complete Benelli M1014/M4 Operations, Maintenance & Repair Guide - Full Size Edition (TM 10698A-23B&P/2) (Carlile Military Library)

The Marine Semi-Auto Combat Shotgun Technical Manual: The Complete Benelli M1014/M4 Operations, Maintenance & Repair Guide - Full Size Edition (TM 10698A-23B&P/2) (Carlile Military Library)

The US Army Pump-Action Combat Shotgun Technical Manual: Mossberg 500 & 590 Operation, Maintenance, Troubleshooting, Disassembly, Assembly & Repair - ... (TM 9-1005-303-14) (Carlile Military Library)

Bruce N. Canfield's Complete Guide to United States Military Combat Shotguns