In the history of the development of firearms in the world, there are always some strange works with strange designs and strange ideas, in these few but almost impressive firearms, not only have different styles of power, but also have different emphases, some focus on fire rate, some chase shooting accuracy, and the biggest feature of this Douglas submachine gun in Canada is that it has no recoil.
The design concept of the Douglas recoilless submachine gun was already formed as early as the late 1960s, and the first prototype gun was not delivered to the Canadian Army for series testing until around 1973, and the results were finally not adopted by the military because of various shortcomings such as complex structure, high cost, and frequent failures, but its unique structural design can still take a certain reference role for the development of small arms.
In fact, this kind of recoilless submachine gun that looks tall just by looking at the name, the original used to offset the recoil is actually not very complicated, the bolt and the barrel can be moved separately, the two are connected together by a spring, after pulling the trigger to fire the ammunition, the gas pressure generated by the propellant pushes the bolt backwards to move, while the barrel is rushed forward, and at this time, between the bolt and the breech of the barrel will be separated from the empty shell space, when the shell is ejected, the bolt and the barrel will be pulled back by the spring , during the pull-back process, the new ammunition is also loaded.
According to the internal structure, although this submachine gun is known as no recoil, in fact, it only uses a spring structure to offset the recoil generated when shooting, and the gun is fired, because of the vibration and the muzzle upswing situation has not been completely eliminated, compared with the submachine gun of the size at that time, the recoil of the gun has indeed been greatly reduced, so that even novices can hold the gun in one hand for continuous strafing, and can maintain considerable accuracy.
The ammunition supply system that supplied the Douglas submachine gun was a rotating cartridge similar to that of the Fighting Nation Bison submachine gun, in which 50 rounds of 9×19 mm bullets were arranged in a spiral arrangement, and the cartridge was inserted obliquely from above the grip into the magazine well when it was loaded. It is worth mentioning that there is no spring component inside the cartridge due to the push of the bullet, and the feeding relies on the gun when shooting, the bolt moves backwards to drive the shaft movement in the middle of the cartridge to complete the process of the bullet entering the chamber.