Black Rain Ordnance In Silent Arms
Black Rain Ordnance In Silent Arms

Bro’s in Silent Arms

Black Rain Ordnance, Inc., (BRO) has been making very high-quality AR-15-style rifles for several years now, and they continue to expand their selection and special features.

Black Rain Ordnance, Inc., (BRO) has been making very high-quality AR-15-style rifles for several years now, and they continue to expand their selection and special features. I had the opportunity to test one of their offerings some time ago and was duly impressed. Everything, from the machined billet upper and lower receivers to the match-grade stainless-steel barrel, was made with a distinct attention to detail, quality and style. Even the company’s Bio-Hazard logo is distinctly etched on every receiver.

Recently, BRO entered into a new, but very much related venture—suppressor manufacturing. The company acquired the assets of HTG Silencers and is selecting the top three models—the Aris, M30-A, and Universal—and rebranding and packaging them with their new line of short-barrel rifles (SBRs).

The most popular HTG suppressor for military applications (including full-auto) and varmint hunting, the Aris provides the maximum noise reduction in a 6-inch can. This silencer produces excellent noise, flash and recoil suppression. The full line of professional suppressors will be full-auto rated and feature stainless-steel construction and a removable end cap for easy disassembly and cleaning.

Suppressor Sense

The suppressor body itself is just a hollow metal tube that attaches to the muzzle of the firearm. Internally it contains multiple separate gas-expansion chambers. These chambers trap the escaping gasses and then release them slowly—though slowly is a relative term. It isn’t slow strictly speaking—just slower than the release absent the suppressor.

This has two effects. First, as the escaping gasses from the burning gunpowder are slowed, the noise they make is subdued. Think of popping a balloon versus slowly letting the air out. Second, since the baffles are temporarily trapping the escaping gasses, any unburned powder that would otherwise exit the barrel and create a more robust muzzle flash is also trapped and burned inside the baffles.

In addition to hiding the muzzle flash and thus helping to conceal the shooter’s location, the firearm’s normal sound signature is disrupted, making locating where the sound of the shot came from more difficult. This happens because, with a suppressor installed, the sound of the shot is louder than the sound of the muzzle blast, and the location from which the listener hears the shot come is the point at which the sonic shock wave, the sonic boom generated by the flying bullet, reaches his or her ear. That point, of course, is not the position of the shooter.

The baffles that divide and create the multiple internal chambers inside the suppressor can have many different shapes and are made from a variety of materials. These variations are designed by the manufacturer to maximize the suppressor’s effectiveness and noise reduction capabilities, as well as its lifespan. Subsonic ammunition eliminates the sonic boom, or the crack of the bullet breaking the speed of sound, and can further reduce the muzzle sound levels by as much as 10 decibels.

Suppressors also reduce recoil in an interesting way. We all know that force equals mass multiplied by acceleration, and that for every force there is an equal and opposite reaction. This is the very substance of the cause of recoil. The bigger and faster the bullet and the smaller the gun, the more recoil the shot produces. But the cause isn’t just the bullet exiting the front of the barrel; the stream of hot propellant gasses, which actually travels faster than the bullet, also contributes to recoil.

Gas doesn’t have much mass, but it does have a lot of acceleration, which has about a threefold effect on force. As such, reducing the velocity of gas has a disproportionate effect on reducing the backwards force (or recoil). By trapping and slowing the release of escaping gasses, the suppressor reduces recoil. Another factor reducing perceived recoil is the added weight of the suppressor attached to the rifle. Also, the baffles themselves act as a muzzle brake, reducing recoil by diverting the gasses backwards and “pulling” the rifle forward. Depending on the size of the cartridge, a good suppressor can reduce recoil by as much a 30 percent. The more powerful the cartridge, the more pronounced the effect will be.

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