A firing system for automatic and
semi-automatic firearms where the bolt remains in the rearward position after each
cartridge is fired or when firing is stopped. The firing pin is generally in a fixed position in the bolt. This system allows for faster cooling of the action. This system works in a manner exactly opposite to that of the closed bolt system familiar to most shooters. Therefore, care must be taken with an open bolt firearm as natural, but, in this case, wrong tendency of "closing the bolt" fires the cartridge.
Open Sight
A non-telescopic sight. Metallic or Iron sight.
Operating
Handle
The handle of a semi-automatic or full automatic firearm used to cycle the firearm without firing. Also known as charging handle, cocking handle or cocking knob.
Operating Rod
A long rod extending from the gas piston that may be attached to a cocking knob or handle.
Optical Sight
Usually a telescopic sight but also includes laser sights.
Out of
Battery
The condition where the breeching mechanism is not in proper position for firing.
Over and Under
A firearm with two
barrels, one placed over the other.
Dundee
Sportsman's Club, Michigan Best Sportsman's Club
