Domestic LS7 submachine gun appeared in Jiaolong Commando.

Weapons of the volunteers in melee and night battles: domestic 50 submachine guns.

Members of the Navy Dragon Commando made a stunning appearance. In the picture, the special forces are dressed in starry camouflage uniforms, armed with LS7 submachine guns and equipped with holographic sights.

In the new century, after the display of a new generation of domestic light weapons, domestic individual self-defense weapons have also been put on the agenda. The relevant units have discussed the performance index, overall design and internal structure of domestic PDW, and some have also made physical objects, such as the domestic XY9 submachine gun listed as PDW by the outside world. But now it seems that the concept of domestic PDW has been abandoned, and the troops still choose traditional submachine guns as a new generation of melee self-defense weapons. In fact, PDW is also silent abroad, with almost no waves, giving people a short-lived feeling.

Looking back, the development of PDW was "a lively beginning and a hasty ending". In 1980s, the US Army formally put forward the concept of PDW. According to the US military, there are more and more indirect combatants in the modern army, including various vehicle equipment operators and logistics support personnel. These people usually spend less time training and getting familiar with weapons, so it is difficult to distribute standard rifles to them. First of all, the traditional rifle is heavy and the back seat is high, so it is difficult to master it without strict training. The pistol is easy to carry, but it is not powerful enough to deal with the target wearing bulletproof vest at close range. Modern warfare is becoming more and more nonlinear, and indirect combatants are facing more and more combat situations. They need a new weapon, that is PDW.

PDW requires the development of a new type of weapon, which is smaller in size and weight than traditional rifles, but more powerful than submachine guns and pistols, and can penetrate bulletproof vests at close range. We are familiar with two kinds of PDW. One is P90 of Belgian FN company, which fires 5.7mm rifle bullets, and can penetrate NATO standard bullet-proof steel plates at a distance of 30m and American helmets at a distance of180m. The other is MP7 of HK Company, which adopts a brand-new 4.7 mm caliber and can penetrate American helmets at a distance of 200 meters. Although manufacturers vigorously promote these PDW, there are few respondents.

Originally, the sales target was second-line non-combatants, but only a few special forces bought it for close combat. The American army that originally proposed PDW was not equipped. Not long ago, the US military's new generation of compact light weapons projects still chose traditional submachine guns.

Although PDW is a foreign word that only appeared in the 1980s, it is no stranger to our army. The familiar musket can be regarded as the earliest PDW. The mauser pistol left a deep impression on the officers and men of our army, so that in the 1970s, the relevant units developed the Type 80 assault pistol, which can be regarded as domestic PDW. However, the design of the Type 80 submachine gun is too old and it is not equipped with troops. In the new century, the modernization of our army is changing with each passing day, and the level of mechanization, informationization and synthesis is rapidly improving. The number of second-line non-combatants has increased, and the development of domestic PDW has been put on the agenda. Now it seems that the domestic PDW has been abandoned, and the army decided to develop and equip a new generation of submachine guns.

Domestic PDW was abandoned for the same reason as foreign countries. The two requirements of PDW are contradictory, that is, reducing volume and weight and improving power are contradictory. The existing ammunition frame has almost no solution, so P90 and MP7 choose new caliber. For the army, adding a caliber to standard weapons will inevitably increase the cost of equipment, improve the difficulty of logistics support, and give people the feeling that it is not worth the candle. In addition, the miniaturization of assault rifles and submachine guns has also made great progress. The short projection length of American MK 18CQBR is less than 0.5 meters, and the stock is only about 0.7 meters after being stretched. The empty gun weighs 2.7kg, which is similar to the Russian AK74U. The latest APC9 submachine gun purchased by the US military is only 0.4m long and the empty gun weighs 2.6kg ... These indicators should be acceptable to PDW and will not increase the logistics support burden of the troops under the existing ammunition system. ?

In view of the above factors, our new generation of light weapons also abandoned the research and development of domestic PDW, and instead developed a new generation of ultra-short barrel automatic rifles and a new generation of submachine guns, equipped with special operations forces and second-line non-combatants to improve their combat capability.