Douluo: Reverse Dimension

Chapter 155 (Weapon Data)

[Weapon information:
Data specification:

Overall length 1447.8 mm
Barrel length 736.7 mm
Barrel twist distance 381 mm
Gun weight 13.3kg
Magazine capacity 20rds (upgrade)
The maximum length after disassembly is 965.2 mm
The maximum range is 2000 (up to 3.2km)

Initial speed: 1200M/s (upgrade)
Ammo base:

12.7x99mm NATO机枪弹（.50 BMG）拥有一个完整的弹药系列，其中M82/M107步枪主要使用下列几种弹药：

M33 ordinary bomb
The standard ammunition of M82/M107, the warhead weighs 45.8 grams, number STD - OTCM 36841, no identification color. The shell contains 15.23 grams of WC 860 double.

Barrett M82A1 sniper rifle.

Basic propellant, chamber pressure 379MPa. It can penetrate 500 mm thick steel plate at 8 meters, and can penetrate 1200 mm thick steel plate at 4 meters. It is used to deal with unprotected human targets. M82/M107 has been using this bullet in the early days. For long-distance sniping. About 33 grams of sodium carbonate monohydrate is installed at the tip of the M0.8 projectile. Sodium carbonate monohydrate is a white powder with a melting point as high as 851°C. The smoke makes it easier for the shooter to observe the impact point, and then correct the trajectory. In contrast, the tracer bullet needs to burn tracer, the weight is continuously reduced during the flight, and the ballistic performance is unstable. There is a difference from the trajectory of ordinary bullets, which increases the difficulty of correction of the scope. .This method of marking the impact point with smoke is more accurate.

M8 armor-piercing incendiary bomb

借用M2HB勃朗宁重机枪的弹药，编号OBS - MSR 11756003，银色弹尖.弹头重40.34克，内装0.97克IM11型燃烧剂。弹壳内装15.10克WC 860型双基发射药，膛压406MPa，初速881米/秒，550米的散布直径小于25厘米（约1.7MOA）在100米可以击穿20毫米厚的钢板，在500米可以击穿16毫米厚的钢板，在1200米可以击穿8毫米厚的钢板，

M17 tracer

No. CON - MSR 11756003, maroon tip. The brand of tracer agent is R256, and the tracer distance is 2450 meters; the shell contains 14.58 grams of IMR 5010 single-base propellant, and the chamber pressure is 372MPa. Stabilization drawback, but still able to see impact point at night.

M20 APIT armor-piercing incendiary tracer

在M8穿甲燃烧弹的基础上，增加了曳光指示功能.编号OBS - MSR 04776009，红色弹尖下有灰色圈.弹头重40.11克，弹尖内装有1.75克IM161型燃烧剂，弹头尾部装有R256型曳光剂，曳光距离300-1750米。在500米可以击穿21毫米厚的钢板，在1200米可以击穿11毫米厚的钢板.弹壳内装14.90克IMR 5010型单基发射药，膛压379MPa，初速887米/秒。550米的散布直径小于25厘米（约1.7MOA）

NM173 AP-S armor-piercing projectile

初速915m/s，550m的散布直径小于15厘米（相当于1MOA）。1000米距离可以30°着角击穿11mm厚的钢板）。

General data introduction:

Barrett is a short recoil semi-automatic firearm. When shooting, the barrel recoils about 25 mm. At this time, the barrel is still locked safely by the rotary bolt. After a short recoil, the bolt is unlocked and the shoot is pushed into the receiver In the curved unlocking slot on the top, the bolt is rotated to unlock the barrel.When the bolt is unlocked, the bolt acceleration arm is instantly pressed back to transfer a part of the recoil energy of the barrel to the bolt to complete the action cycle.After that, the barrel recoil is in place and fixed, and the bolt continues to eject the cartridge case from the recoil. The bolt ejects a bullet from the magazine and sends it into the chamber, and finally the rotary bolt closes with the barrel.

The receiver is divided into two parts (upper part and lower part), which are stamped from thin steel plates and fixed with cross bolts.The barrel is grooved for faster heat dissipation and reduced weight, and it also houses an efficient large muzzle brake.Early muzzle brakes were conical, the newer M82 is equipped with a double-bore right-angled arrowhead (V-shaped) brake. This brake reduces recoil by nearly 70%. The defect is the gunpowder ejected from the brake every time a bullet is fired. The gas will bring up a large amount of dust and loose particles in the vicinity of the shooter,

Barrett can be quickly decomposed into 3 parts: upper receiver, lower receiver and bolt frame.The disassembly pin is located on the right side of the receiver, one is in front of the magazine, and the other is near the bottom plate of the buttstock. The upper and lower receivers are the main parts. In order to ensure its strength and wear resistance, high carbon steel is selected.The lower receiver is connected to the bipod, the gunner base plate and the grip, and its interior includes the bolt parts and the main spring device.The upper receiver mainly includes the barrel part, that is, the barrel, the barrel recoil spring and the buffer. The mechanical sight, optical sight seat and handle are welded on the upper receiver, and the gun is welded together with the inside. Tube bushing and barrel stop pin.After firing, the gunpowder gas pushes the warhead to move forward along the barrel, and at the same time acts on the bottom of the cartridge case, transmitting the thrust to the bolt, then the bolt is locked and protruded to the barrel sleeve, and finally passed to the bolt frame through the bolt body rear.This disperses the shock of firing to avoid damage to the locking mechanism.

Barrett's adjustable bipod is compatible with the M60 machine gun and the grip is common with the M16A2 rifle.The carrying handle is mounted on top of the handguard, located in front of the scope.

A specially developed telescopic mount can also be installed in front of the magazine. This mount allows Barrett to be mounted on a tripod or a vehicle, boat, etc. and can act as a buffer during recoil to prevent damage to the mount. ,

In view of Barrett’s shortcomings of heavy weight, our company has researched M82A1LW, which is the light weight (Light Weight) M82A1, which is about 82kg lighter than the standard M1A2.3. The weight of the machine and the machine frame has been reduced by about 0.5kg, and the muzzle brake and some small parts are made of titanium alloy.

Barrett can install scopes and folding mechanical sights in case the scope is damaged. M82 is usually equipped with Leupold Mark 4 telescopic sights, and Barrett has extended Picatinny rails and long and short focusing telescopes so it can be used for aiming More accessories All M82s have a collapsible carrying handle and bipod (both detachable in the M82A3)
The difference between M82A2 and M82A1 is mostly in the structure:

The grip and trigger are advanced a little behind the chamber before the magazine, and the front grip, which is almost close to the magazine, is also moved forward for a distance near the barrel.

50 BMG caliber rifles (including variants of the M82 rifle) fire the 42.7 gram M33 military-standard bullet to a maximum range of 6800 meters.But it is often misquoted, claiming that this weapon can deal with targets at 6800 meters. In fact, this is the safe distance mentioned in the manual to allow shooting. Its effective range is about 1500 meters. 50 caliber bullets have 6800 meters m lethal potential, but need to use a firing method similar to artillery (the muzzle elevation angle exceeds 30°) 6800 meters is only a reference when building a shooting range, because when the maximum safety range is required, the length of the shooting range is required to be greater than this distance M82A1 this The recoil of the sniper rifle is not much, because part of the recoil energy acts on the barrel, bolt and bolt frame, and the gun itself absorbs part of the recoil energy, but the most important thing is that its efficient muzzle brake reduces most of the recoil , which ensures the comfort and shooting accuracy when shooting.

The user should abide by the user manual, and conduct a pre-modification review when modifying the weapon, such as avoiding disassembly of key parts, and preventing accidents during use of the weapon. 】

(End of this chapter)