Muzzle Devices 101

Although we’re in the business of hiding mounting devices on firearms, their importance is still significant, especially since they don’t get a ton of facetime as a topic of discussion. We’ll be shedding some light on muzzle brakes, flash hiders, compensators, and everything in between because what you mount onto your host firearm prior to mounting your silencer does play a role in the overall performance of the gun. Read below for an intro course to some terminology used and the main reasons why you might use one over the other.

Muzzle Brakes

Will Brake for Muzzles

The first device up for discussion is the muzzle brake. Its purpose is to port exiting muzzle gasses to the sides in order to reduce recoil. When the muzzle brake is installed on the firearm, the ports will be horizontal so that when you shoot the gun, the air is vented out to the left and right, instead of equally in all directions. In order to obtain the correct positioning of the muzzle brake on the firearm, it needs to be timed.

Timing is to ensure that the ports are properly positioned on the firearm. Almost all muzzle brakes should be timed, although, with a silencer on the firearm, it isn’t AS important.

Sometimes, when you’re screwing the muzzle brake onto the host firearm, it won’t automatically be timed correctly. There is a tool called a shim (similar to the shape of a washer, except they are the exact same thickness all the way around) that usually come with muzzle brakes in varying thicknesses so that you can time the muzzle brake correctly.

It is worth noting that muzzle brakes are highly effective at reducing the recoil of their host firearm, but the downside is that all that directional gas will create an obnoxious amount of pressure and noise for anyone standing to the side of the firearm.  While this is really only relevant for unsuppressed fire, it’s worth noting that your range buddies won’t be super excited to go shoot with you if you're running an unsuppressed muzzle brake on your AR-15!

Flash Hiders

Flash dance

Flash hiders are another option to mount onto your firearm. Aesthetically, they look like evenly spaced prongs. As the name of this device indicates, the purpose is to reduce the muzzle flash when shooting. Especially important in no or low light shooting environments to protect the shooters night vision, flash hiders break up the escaping gas and unspent powder to reduce the combustion that happens after the projectile leaves the barrel.

Flash Hiders come in multiple shapes and sizes and are generally categorized by the number of prongs and whether they are “open” or “closed.”  Three prong flash hiders are the most common silencer hosts but you will see some four prong and “closed tine” designs as well.  The classic A2 Birdcage is a great example of a closed tine system that reduces the possibility of snagging it on bags, clothing, vegetation, etc.

Many manufacturers make a three-prong flash hider with prongs of different length.  Since we get asked about this quite a bit, the reasoning is simple enough to cover here. Open prongs of the same length have a tendency to create a “tuning fork effect” as the projectile leaves the barrel.  By using prongs of differing lengths, they reduce the resonating effect and remove that pesky PING that can be bothersome to some shooters.

Compensating for What?

Although they are less prolific as compared to muzzle brakes and flash hiders, we thought we should mention another alternative: compensators. The main purpose of this type of device is to hinder the vertical climb of a muzzle by porting gas in a contradictory direction.

Most often, compensators have holes or ports along the top of the device so escaping muzzle gas has a downward force on the end of the firearm – counteracting the natural “muzzle flip” of the gun.  Many compensators also include some manner of horizontal ports that reduce recoil, as a muzzle break would, in addition to their muzzle rise compensation. 

Thread Life

There are two more terms that we feel are necessary to mention and define: thread count and thread pitch. The main thing you need to remember when referencing these two, although this day in age, they tend to be used interchangeably, is that thread count is the standard American way of referencing threading, and thread pitch is the metric terminology used. Thread count measures by diameter in inches and how many threads there are per inch, whereas thread pitch measures by diameter in millimeters and the distance of space between each thread.

Said differently, a 1/2x28 thread count is a ½” diameter with 28 threads per inch. Additionally, a m13.5x1 thread pitch is 13.5mm in diameter with a thread every 1mm.

Best in Show

So what’s the best device to use? It almost always depends on what you want and what your goals are.

Generally speaking, if you’re shooting suppressed, we usually see people use flash hiders for a variety of reasons, but most particularly noted for (1) not typically having to time it, and (2) suppressed shooting already helps reduce recoil.

Muzzle brakes inside of suppressors act as a sacrificial baffle - it is thought that the ports will absorb some of the initial blast. However, the amount of absorption is still up for debate, and there’s an argument to be made that it’s negligible. In the grand scheme of things, if you purchase a quality suppressor, having a muzzle brake potentially absorbing some of the initial blast errs more on the trivial side than beneficial.

So there you have it. A quick crash course on all things mounts and some terminology that usually gets coupled with it. We understand that this topic can be dense, so reach out to us if you have any questions!