Open breech weapon
Open loop minesweeping system
Open loop minesweeping system
Open-framework receiver automatic cannon
Operating lever for the block and hammer of a self-loading hand
Operating method for automatic weapons and automatic...
Opposed round parallel path single bay ammunition feed system
Optical detection and location of gunfire
Optical sighting system for a gun mounted on mobile platform
Optically clear turret dome, and combined turret shroud
Optically set fuze system
Ordnance
Ordnance barrels
Ordnance ejector system
Ordnance induction firing system
Ordnance recoil energy control and recovery system
Ordnance system with common bus, method of operation and...
Organic cargo handling system
Orthogonal line deployment device
Out-of-battery lock for automatic primer feed mechanism