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Built by General Electric, it first entered service in 1958, replacing the earlier and much simpler AN/MPQ-10. The MPQ-4 could determine the location of an enemy mortar in as little as 20 seconds by observing a single round, whereas the MPQ-10 required several rounds to be launched and could take 4 to 5 minutes to take a "fix".
However, in an electronic-firearm, an electric current instead of conventional mechanical action is used to ignite the propellant which fires the projectile. [2] There are two approaches to electrically firing the cartridge. One method retains the primer, which functions analogously as a conventional primer.
The Voere VEC-91 is a rifle made by Voere and was the first commercial sporting rifle to combine caseless ammunition and electronic firing.Depending on the cartridge that was chambered for, it could fire either a 5.56 millimetres (0.219 in), 5.7 millimetres (0.22 in), or 6 millimetres (0.24 in) projectile at muzzle velocities at up to 930 metres per second (3,100 ft/s).
The GAU-19/A is designed to accept standard NATO .50 caliber M9-linked ammunition. The rate of fire is selectable to be either 1,000 or 2,000 rounds per minute. The Humvee armament kit version fires at 1,300 rounds per minute.
Repointing is the process of renewing the pointing, which is the external part of mortar joints, in masonry construction. Over time, weathering and decay cause voids in the joints between masonry units, usually in bricks , allowing the undesirable entrance of water.
L44A1 7.62mm Machine Gun (Royal Navy L7 variant fitted with L1A1 Safety Unit and No. 1 Mk 1 Electrical Firing Unit, normally pintle-mounted or set in remote gun pods) [24] L45 L45A1 7.62mm Drill Machine Gun (Drill purpose version of L7) L46 L46A1 7.62mm Drill Machine Gun (Drill purpose version of L7) L47 L47A1 7.65mm Automatic Pistol [109] [173]
The XM214 was first developed for aircraft applications. Later General Electric developed it into a man-portable weapon system, known as the GE Six-Pak. The complete Six-Pak system weighed 85 pounds (38.5 kg) with 1,000 rounds of ammunition, comparable in weight to some heavy machine guns. The basic gun in the Six-Pak weighed 27 pounds, or 12.2 kg.
The M9 gun director can be seen in the center background of the photo. The M9 gun director was an electronic director developed by Bell Labs during World War II . This computer continuously calculated trigonometric firing solutions for anti-aircraft weapons against enemy aircraft.