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PISTOL Silencer / suppressor

The SAI COBRA pistol silencer system is made for the pistol shooter, who wants the widest possibilities to perfectly set up a silencer for his personal needs.

The same silencers can be set up for different calibers and for different tactical situations, from shooting practice on the shooting lane to super silent operations.

The SAI COBRA silencer system is made for use on pistols, caliber 6,35 - .45 caliber.

The series includes 3 different models:

  • COBRA Impuls+
  • CCOBRA Direct
  • COBRA RB

 

The COBRA Impuls+

A silencer designed with an integrated impuls device also known as a Nielsen Device. This impuls device enables pistol shooters to use silencers on typical pistol actions where the barrel activates the recoil motion. No tools are needed for fitting or removing the silencer. The spring power of the impuls device can be adjusted with a ball point pen to regulate the spring pressure according to caliber and ammunition type used. Will operate even on full auto Glocks.

 

The COBRA Direct

For pistols with a non-moving barrel. Same baffle set up as Impuls+ model, “K” and “H” types but shorter and direct fit to barrel.

The COBRA RB

COBRA RB model is a special silencer / suppressor that uses disposable rubber baffles – it is VERY quiet, even with supersonic ammunition, but the baffles is burnt away in between 50 – 80 shots depending on ammunition used. The COBRA RB model works on all pistol models even without impuls unit fitted.

 

Specifications:

Model

COBRA Impuls+

COBRA Direct

COBRA RB

Caliber

7,65 - .45

7,65 - .45

7,65 - .45

Length

200mm

158mm

158mm

Diameter

32mm

32mm

32mm

Weight

255gram

197gram

175gram

Materials

Alu/Steel

Alu/Steel

Alu/Steel

Surface

Black non glare

Black non glare

Black non glare

 

The SAI COBRA line of silencers are very user friendly and can be used and serviced without the need of tools.

 

Choice of baffle types.

For different tactical situations, different baffle types can be inserted by the operator on all COBRA models.

The range of possible use varies from everyday use, over special needs to stealth situations, requiring maximum silenced shoots.

 

All COBRA models can be taken apart for cleaning and maintenance.

 

What is Sound?

The sound from a firearm is in fact a combination of the following five sounds:

  • The powder gases leaving the barrel
  • The supersonic boom of the bullet
  • The mechanical sound from the firing action
  • The bullet flying through the air
  • The bullet impacting the target (Ambient effects, such as echo also affect the perception of sound)

 

The loudness of sound is measured in Bells – Or deci Bells; dB. It is a relative unit; a logarithmic scale based on the capabilities of the human ear. Different sounds have different frequencies – Typically many interfering frequencies, that all have different impacts on the human ear – Some frequencies are intercepted as being louder than other frequencies, even though the loudness of the sound itself – Measured in deci Bells is not that loud. This makes sound measurements rather complicated.

Long-term exposure to noise and age also affects the ability to detect sounds, and to varying degrees we are also affected differently by different sound frequencies. Ambient weather conditions and the type of terrain the shooter finds themself in also affect the perceived sound, sometimes quite radically.

 

What sound can sound suppressors reduce?

If we analyze the five sounds listed above, the loudest sound produced by the firing of a firearm is that of the powder gases escaping the barrel – which is precisely what a sound suppressor is able to reduce.

As well as suppressing sound, a sound suppressor also significantly reduces recoil and muzzle blast, which has a positive effect on the shooter's aiming accuracy.

 

Are there any disadvantages to using a sound suppressor?

There are many benefits to using a sound suppressor, though it’s also important to understand what other factors come into play when using a sound suppressor, namely impact shift, the need to recalibrate the sight, the added weight and length of the firearm, and the additional wear on full and semi automatic firearms due to increased pressure during repetition firing.

Frequency

As already described, sound is typically measured using the dBa scale. However, though many scientists believe this scale is less useful for extremely short, high-impact sounds than certain other methods, this method continues to be generally the only one in use. This is particularly relevant when it comes to measuring the relative performance of sound suppressors, as a simple dB value encompasses only part of our complex understanding of sound.

 

There are three sound frequency weightings of the dB scale: all relating to the capabilities of the human ear. bDA for lover levels, dBC for higher levels. A “Z” weighting represents the no weightings of the measured sound.

 

In developing the rubber baffle system for our pistol line of sound suppressors, SAI made a series of detailed sound measurements on 9mm pistol caliber with sound reduction. The tests were made with sub sonic as well as with super sonic ammunition. Some of the results are pictured in the graph below. The graph shows the sound exposure in dBA on different frequencies using the eVE tech rubber baffle in a SB9pe bodyguard sound suppressor. The SB9pe silencer is the predecessor of the current COBRA line of sound suppressors made by SAI.

 

 

We at SAI have tested every known measuring method. To give you an idea of how complex our understanding of sound is, we have included test results involving our SAI SB9pe Bodyguard sound suppressor for a specific cartridge type under specific aerial conditions.

The graph shows frequency in Hz along the x-axis and sound exposure in dBa on the y-axis. Again: Note that the frequency is exponential, meaning that around a 3 dB reduction results in a perceived reduction of 50%.

The task of a sound suppressor is to reduce the frequencies that affect the human ear most of all - we simply don’t experience sound in the lower and upper areas of the curves.

 

What you should consider

Modern sound measuring technology has far exceeded the human ear’s ability to determine the relative performance of the many different sound suppressors on the market today. Once you have defined your requirement, we therefore recommend trying out our products for yourself.

To the right we have included a summary of the types of things that you should consider when investing in a sound suppressor.

We are always on hand to assist with any questions you have relating to our product range.