Blish lock is a delayed standby breech system, in which the inclined metal wedge and breech block interlock with the gun body. Under high pressure, such as when the box is fired, the angle of the inclined plane makes the mating surface catch the solid. As the pressure drops, the surface will slide again and the wedge will continue to move upward.
This allows the breech to be unlocked. This concept is used in all thompson submachine gun except M 1 and M 1A 1 (this is a simple blowback operation). The first Thompson experimental submachine gun appeared in 19 19, and the first production model appeared in 192 1. It was manufactured by Colt Firearms Manufacturing Company under the contract. Just like the later M 1928 model, both M 1928A 1 and M 1 submachine guns were made by Auto-armour and Savage Arms, and some licensed products were also made by B.S.A?
In Britain, thompson submachine gun has various versions, some of which have never reached full production, such as "military model" M 1923.
The development of this version aims to expand the effective range to 600 yards (about 550 meters). In order to achieve this goal, M 1923 is equipped with a special Remington-Thompson cartridge case, and the weight of the bullet fired is 250 (16,2g) instead of the standard 230 45ACP bullet.
Therefore, its initial velocity of fire is higher, about 1450 fps(440m/s). This weapon also has a longer barrel and optional bipod and bayonet mount. It has been tested, but it has never produced any important data. Another very rare version is the original model 1927, which is 19266.
The first type used for military purposes is the M 1928 Thomson submachine gun, which was used by the US Navy during its trip to Nicaragua (1927-32). The so-called "navy" mode is characterized by a horizontal forearm replacing the front grip and increasing the rotation of the sling.
With the beginning of World War II, the US Army purchased a large number of 1928 submachine guns equipped with "Navy" and named them M 1928A 1. These weapons are quite expensive to produce.
1942 the simplified version of M 1928A 1 was adopted by the army, called "M 1", with a fixed iron sight, which was changed to a simple blowback operation. Later, the version of M 1A 1 was adopted. By adopting a fixed one,
Although the number of thompson submachine gun is limited, he has served in the United States Army for a long time. American police still used Thompson guns until1970s or 80s, and some of them can still be found in strange police armories all over the world. ?
These guns were widely exported before and after World War II. During World War II, many guns were provided to Britain and the Soviet Union through the loan program. It must be pointed out that Soviet troops generally don't like submachine guns because they are too heavy and have no penetrating power. Of course, it is compared with 7.62x25mm Soviet submachine guns, such as PPSh-4 1 or PPS-43.
Thompson M 1923 "Military" submachine gun uses special Remington-Thompson ammunition. All thompson submachine gun are fired from an open gun bore, and the inclined handles are located at the top of boxes with models 192 1 and 1928, as well as M 1 and M/.
The independent manual safety and automatic mode selector lever is located on the left side of the watch case above the trigger, and the barrel is usually partially tailed. On model 1928, there is a so-called "Katz compensator" muzzle brake, which does not exist on M 1 and M 1A 1.
Ammunition is supplied by a double-row magazine with 20 or 30 rounds or a drum with 50 rounds or 100 rounds, and the magazine is inserted into the magazine from below; The drum is inserted into the same slot from the side, and the M 1 or M 1A 1 submachine gun does not provide a drum magazine.
Wooden accessories include pistol grip, detachable wooden shoulder rest and detachable front grip or horizontal forearm. The scenic spots in the pre-war mode have a front and a protected rear, which are combined into one.