Reflex Suppressor Technical information

 

Reflex Suppressor: Two Point Mount

Unlike a conventional muzzle mounted sound suppressor which is fixed and aligned to the barrel only by a small thread and thread shoulder (single point mount), Reflex Suppressors are aligned at two points on the barrel nearly 8 inches apart. The front of the suppressor is aligned on a spigot at the muzzle (see below) and the rear of the suppressor is aligned on the outside of the barrel by a close-fitting interchangeable bushing (left). When fitted in accordance with the designer's instructions the retaining thread and shoulder do not contribute to the correct alignment of the suppressor. This means that the thread can be made very nearly the full original diameter of the barrel (-1.0 mm or -0.040" is usually OK).

 

Reflex Suppressor: Single Point Muzzle Mount

BR-Tuote also produces a line of muzzle mounted suppressors for weapons without any protruding barrel like the MP5, or very short barreled (11" and 7") AR15 variants. Mounts for the HK Tri-lock or factory muzzle threading are available. Made entirely of steel these suppressors are designed for rough use and full-auto fire like the rest of the BR line of Reflex Suppressors.

Suppressor Mounted Length

Mounted length is the length by which a suppressor increases the length of a weapon when mounted. Most muzzle mounted suppressors increase the overall length of a weapon by 8-14 inches. What is the point of having a short barreled carbine if the suppressor is going to turn it back into a full-sized rifle or worse. The Reflex Suppressor design allows a much greater internal volume for a very short mounted length. This results in a good noise reduction value for a very small increase in the weapon's over all length. A T8 Reflex Suppressor only adds 3.5 to 4 inches to the OAL depending on the model. The picture above shows dramatically the difference in mounted length of a T8ARM4C vs a competing design. Both rifles have identical length barrels.

Muzzle thread and spigot details

The usual reflex suppressor muzzle thread and spigot detail is a metric thread (M14x1, M15x1, M17x1 or M18x1) with a long cylindrical "spigot" (F) and a relief cut (G) between the thread (H) and the shoulder (E) - see drawing. The purpose of the muzzle spigot (F) is to ensure precise alignment in conjunction with the close-fitting barrel bush at the rear of the suppressor.

With this design the muzzle thread (H) is not used for alignment and the designer advises that the thread should not be a close fit. Click on Owner's manual below to see a drawing and detailed fitting instructions.

Barrel Bushing

The interchangeable bushing at the rear of the Reflex Suppressor is delrin or brass (high temperature applications). The bushing is reamed out on a lathe to the correct size to fit each individual barrel. The bushings are easily removable to allow a single suppressor to be used on several different rifles. Spare bushings are available.

Quick Detach Mount - BR Tuote

The BR-Tuote QD Mount offers a solution to users who wish to maintain the factory flash-hider on the weapon. This QD Mount does not require any modifications to the weapon nor the fitting of an expensive, specially machined, flash-hider. The mount is not weapon specific, allowing the suppressor to be moved from weapon to weapon in seconds and all without fiddly and time consuming fitting or alignment requirements.

This mount allows the greatest flexibility for mounting solutions of any QD mount on the market. There is never any worry that the suppressed weapon will go down for maintenance, taking the suppressor with it. The suppressor can be issued to whomever needs it without the need to swap weapons and re-zero sights. Just drop it on and go!

The QD mount consists of a steel collar designed to drop over the exposed portion of the barrel, behind the flash-hider. The suppressor is then slid over the muzzle and screwed onto the mounting collar. The collar is designed to interface with the bayonet lug allowing one handed mounting and removal of the suppressor. The entire process takes less time than it does to read about it.

Quick Detach Mount (SP) - Ase Utra

New from Ase Utra, the SP mount offers rapid on-off combined with a very solid mounting on the factory AR/M4/C7 flash-hider. This robust mount is not weapon specific, allowing the suppressor to be moved from weapon to weapon as required in only seconds.

The SP mount utilizes a one piece eccentric for simplicity and strength. As an added safety bonus, the suppressor cannot be attached to the mount if it is not properly in place on the flash-hider.

Mounting is simple and fast: Remove the mount and slip onto the flash-hider until the eccentric engages the rear ring. Slip the suppressor over the flash-hider and screw onto the mount until tight. Thats all there is to it!

 

Reflex Suppressor Inner Tube

The suppressor expansion chamber has an inner tube that sleeves back over the barrel (combustion gases do not come in contact with the barrel). The standard inner-tube internal diameter is 22 mm.

For barrels larger than 21 mm (0.827") outside diameter, measured at the back of the suppressor, (usually 210 mm from the muzzle) a larger diameter inner tube - 25 mm or 29 mm can be provided.

Baffles

Suppressors reduce muzzle signature by lowering the pressure at which the gases are vented to the atmosphere. Suppressor baffles provide a large surface area to cool and trap the combustion gas, lowering its pressure. The more baffles, the better the sound reduction.

However, with supersonic ammunition there is a point of diminishing returns where the muzzle blast noise is reduced below the bullet flight noise (which can not be suppressed).

The Reflex Suppressor T8 model (T4 shown) with eight baffles is a good compromise between sound reduction, length and weight. The T8 models comply with British HSE Noise at Work Regulations on a typical 7.62x51 (308 Win) sniper rifle.

The Ase Utra Z-Jet Suppressor (right) utilizes complex asymetric baffles for maximum noise reduction in a small package. This muzzle mount suppressor is exceptionally quiet on any weapon.

Baffle Hole Diameter

Standard baffle apertures are 7.5 mm , 8,5 mm, 10,5 mm and 13.0 mm. As a rule, the bullet caliber (bullet actual diameter ) plus at least one millimetre gives the exit aperture diameter.

7.5 mm hole - 5.56mm (.223) to 6mm
8.5 mm hole - 6.5mm to 7.62mm (.308)
10.5 mm hole - .338
13 mm hole - .458

The reinforced "magnum" model (stamped "M") for cartridges above 30-06 case capacity has 10.5 mm exit aperture as standard (other aperture sizes to special order).

The smaller the baffle hole diameter the better the sound suppression, but the difference between each of the above hole size increments is only 1 or 2 dB. In general, it is better to reduce the sound by adding more baffles than risk making the baffle holes too small.

All rifle bullets yaw a little on leaving the muzzle. The longer the bullet the more baffle hole clearance needed to accommodate this yaw without risk of a bullet grazing a baffle. If a bullet grazes a baffle, it can cause a "flyer" or potentially the destruction of the suppressor if the bullet is caught by the baffle.

Maintenance & Cleaning

The Reflex Suppressor is a practically maintenance free device. The suppressor should be cleaned after each shooting session. Remove the suppressor or leave the action of the rifle open after use. This helps avoid corrosion by letting condensation from powder gases evaporate away. A small amount of light gun oil sprayed into the suppressor will prevent corrosion. Normal fouling from powder and primers do not have an effect on the suppressor's functioning. Loose solid impurities like powder grains and carbon chips are easily removed by shaking the suppressor, while keeping it vertical, front end down. Washing with liquids or solvents is unadvisable.

Owner's Manuals

Every Reflex and Z-Jet Suppressor comes with a printed Owner's Manual. Manuals are also available here in PDF format.

Owners Manual - Reflex Suppressor
Owners Manual - .50 cal Reflex Suppressor
Owners Manual - R16MP5 (tri-lock)
Owners Manual - MG16 Handgun Moderator
Owners Manual - Z-Jet Suppressor

Ammunition and Flight Noise

Sound data published on each Spec Sheet was measured by Alan Paulson in accordance with the specific testing protocol detailed on page 85 of his book "Silencer: History and Performance Vol 1". This test protocol meets the requirements of MIL STD 1474C and the NATO test procedure AC/243.

Supersonic ammunition involves a significant flight noise that averages approximately 150 dB. No suppressor can reduce a bullet's flight noise.

Accuracy and Point of Impact

Typically a suppressor will increase a rifle's accuracy. Adding weight to the end of a rifle barrel tends to reduce the frequency of that barrel's harmonic vibrations. Additionally, a suppressor strips away the high velocity gases following the bullet. This has the effect of reducing the yaw imparted on the bullet as it exits the muzzle.

Adding a suppressor to the end of a long barreled rifle will tend to change the group point of impact. This change will be predictable and consistent meaning it can be compensated for through pre-determined sight adjustments.

Automatic Fire

High rates of fully automatic fire are the most difficult challenge for any suppressor. Excessive heat and pressure can both destroy the suppressor tube and baffles as well as the host rifle's barrel. The Reflex Suppressor is specifically designed and built to survive almost unlimited amounts of automatic fire. It is one of the only suppressors certified for use on belt fed weapons.

The Z-Jet suppressor, because of its unique construction and design, is also able to soak up large amounts of rapid or automatic fire that would destroy most other suppressors. The Z-Jet SP was tested on the proposed 5.56mm PDW until the weapon was too hot to hold. The suppressor survived the test better than the PDW test weapon. A special Z-Jet suppressor was designed specifically for use on the C6/Mag58 7.62mm belt fed machine gun.

The weakest link involved in suppressed fully automatic fire is the bullet itself. When the rifle barrel becomes seriously overheated, bullets soften and may experience jacket separation, which may significantly degrade suppressor life.


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