What is the muzzle brake-compensator?

When shooting any firearm recoil inevitably arises.It is caused by gas pressure in the barrel, and automatic traffic arrangements in preparation for the next shot.Effect of return on parameters such as accuracy, aiming and ease of operation, is very large.Many designers have tried to minimize the throwing weapons and rate of return.With the advent of automatic weapons, this issue has become even more relevant.It was then and the first DTC (muzzle brake-compensator).They belong to the category of gas muzzle devices.

Definition and purpose

Muzzle Brake - a compensator, which is designed for use in automatic weapons to reduce the recoil momentum.Depending on the type of design effectively reducing the level of 25 to 75%.Also partly or completely blanked undesirable effects such as the sound of the shot, the flame and throwing arms up.In general, this construction is not mandatory, but often without it simply can not do without.A classic example - a muzzle brake on the "boar" or AK-74.

The principle of

The device is based on the principle of changing the speed and direction of the propellant gases that are released during the combustion of the main charge of the cartridge or projectile.The rate of spread is very high - up to 1500 m / sec.It is a force that is directly opposed to the direction of motion of bullets.Muzzle Brake effectively dampens the momentum.It uses part of the propellant gases arising.Because these devices are more advantageous, because it does not degrade itself weapon ballistics, moreover, they are reliable and easy to build.The main field of application - pistols, assault rifles and artillery.


Classified DTC on several grounds.The number of cameras (tubeless, single and multi-chamber), the number of side holes (single and multi) and shape (window, mesh and slotted).There is also a classification according to the principle of action - reactive, active or active and reactive.

active action implies a blow jets of gas on a certain surface, which is attached to the trunk.At the same time, a force opposite to the direction of impact.

Reactive action implies a symmetrical removal of powder gases are used in the direction of impact.Thereafter, the reaction takes place, which is called "the expiration of the powder gas," and weapons gains momentum, pushing it forward.

Active-reactive action combines both principles in one design, so gas is first thrown forward and then discharged in the opposite direction and dampens returns.

Some features

However, despite its efficacy, yet the muzzle brake - the device is not perfect.For example, the extinction of the impact can be simultaneously accompanied by a significant increase in the sound of the shot.Another unpleasant factor - the impact of powder gases in the arms and hand, which has the effect of unmasking.

very important nature of the impact of the muzzle brake, because it determines the degree of absorption efficiency benefits.There are three types of expansion joints:

  1. Longitudinal action.This muzzle brake reduces the effect of recoil or trunk only in the longitudinal direction.
  2. Cross-action.A more successful designs that create a lateral force of the shot, prevents tipping moment.These devices are called compensators.
  3. combined action.They received the highest prevalence in the armed forces.Such devices are referred to muzzle brake-compensator.They are popular because the impact and weaken, and reduce the overturning moment at a time.

Muzzle brake-compensator AK-74

AK-74 emerged as a time when the Soviet Army needed a radically new weapon than the AKM.They are quite different in a constructive manner, despite the fact that the main mechanisms of the machine had no change.In particular, among the many changes can be identified and the presence of a fundamentally new design of the muzzle brake-compensator compared with previously used in the AKM.In this machine, he had the look of a small weighting placed on the muzzle.

The AK-74 muzzle brake considerably improved - now it's a long two-chamber device.The first chamber is a cylinder intended for the bullet, he also had three outlet powder gases, and two slots located at the diaphragm.The second chamber has some other device - two wide windows, and the front - the same aperture for the bullet.These changes have a positive impact on the balance and accuracy of fire, with the improved camouflage and an arrow, as the flashes of flame almost not noticeable.In one form or another similar design and its modifications (DTC 1-4) used today.

This DTC is designed for installation on a wide range of weapons: rifles AK series of up-to-date "ar" - AK-101-105, hunting carbines "Saiga" MK and MK-103 and AKS-74U and AK-74M

Muzzle Brake SCS-45

It is an old gun has quite acceptable performance for use as hunting.But because of the high returns and designers created the DTC for the carbine.This device has the name "Wolf Tooth" and combines the functions of the DTC and the flame arrester.The first chamber serves as a compensator and a flame arrester and the second - the impact absorber, directing gases so that they counteract the impact force.

One of the structural differences - the ability to set it on trunks that do not have the thread, which increases the versatility.Mounted on a DTC with a special collar, which is fixed for the mouse with two screws.Available device in the United States, as the SCS is popular mainly in foreign countries - and as a hunting weapon, and a weapon for target shooting.


Standard muzzle brake-compensator for the AK-74 has the following specifications:

- total length - 83 mm;
- weight - 104 grams;
- diameter - 27.5 mm.

DTC 1-4 (description)

Muzzle brake-compensator DTC-1 is designed for installation on AK 7.62 and 5.45 mm.It weighs 128 grams.It is made of special stainless steel 45 or 40X with an additional heat treatment.

Muzzle Brake DTC-2 has a different design and is designed for installation on AK 7.62 and 5.45 mm.The round shape has several holes for the propellant gases.It weighs 108 grams, is made of the same materials as the DCT-1.

Muzzle Brake DTC-3 is also called "DTK-1 long", it has the same design.Placed on AK 7.62 and 5.45 mm.It is made of the same materials as the DCT-1.

DCT-4 - is a perfect example, made of titanium alloy.Now the access to it is closed, the acquisition is only possible secret service and only enterprise-producer.It has a folding design and is more environmentally friendly than conventional DTC.Since the thermal effect on the body is very large, it comes bundled with a special sealed tape.


Earlier these devices were exotic, but now they are - self-evident thing.Modern hi-tech machines, though, but still can not deal with such things as the impact and its impact on accuracy.That is why DTC is so important.