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INTEGRALLY SUPPRESSED RIFLES AND
SUPPRESSED BARRELS
NOTE: Prices quoted do not
include Federal Transfer Tax or any applicable state sales tax
| PAT Target $775 Retail 
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PATS Target Stainless $800 Retail (shown with optional Hogue
stock) 
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| Our Model PAT and PATS target rifles are
unique in appearance because they don't look like suppressed rifles! Externally
identical to the standard Ruger 10/22T and K10/22T, they retain the beautiful
hammer-forged barrels and rugged laminated stocks of the originals. OPTIONS
include matching 4x32 scope, rings, and base; Hogue rubber-coated stock; or Butler Creek
bipod stock. The rifles are extremely accurate and will function reliably with all
types of ammunition. Lead bullets are acceptable, though metal plated, unwaxed
bullets will create less fouling. Quietest performance is achieved with subsonic or
standard velocity ammunition, but most high velocity loads also will remain subsonic
(Warning: Hypervelocity rounds such as CCI Stinger will produce a loud sonic crack).
In all cases sound reduction is on par with any other suppressed .22 rifle on the
market. The noise generated is similar to that of a BB gun or air rifle, depending
upon the type of ammunition used. Cleaning is easily accomplished without the need
for disassembling the suppressor. Dealers, please send us your signed FFL
for a price quote. We also can convert a
customer provided Ruger 10/22T or K1022T barrel, starting at $475 for the PAT
configuration, and $525 for the PATS configuration. Prices include return shipping
to your dealer, but do not include the Federal Transfer Tax. |
PACK Combo Kit $800 Retail
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PACKS Combo Kit Stainless $850 Retail 
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| Our Model PACK and PACKS combo kit carbines offer
you the best deal in suppressed .22 rifles because each carbine comes complete with two
barrels and two stocks. You can quickly configure them as heavy barreled suppressed
rifles for match work and plinking; or switch them back to standard iron-sighted carbines
for those locales where suppressed hunting or possession is restricted. OPTIONS
include matching 4x32 scope, rings, and base, Hogue rubber-coated stock, or Butler Creek
bipod stock. With suppressed barrels attached, the rifles are extremely accurate and
will function reliably with all types of ammunition. Lead bullets are acceptable,
though metal plated, unwaxed bullets will create less fouling. Quietest performance
is achieved with subsonic or standard velocity ammunition, but most high velocity loads
also will remain subsonic (Warning: Hypervelocity rounds such as CCI Stinger will produce
a loud sonic crack). In all cases sound reduction is on par with any other
suppressed .22 rifle on the market. The noise generated is similar to that of a BB
gun or air rifle, depending upon the type of ammunition used. Cleaning is easily
accomplished without the need for disassembling the suppressor. Dealers,
please send us your signed FFL for a price quote. |
OUTBACK short barrel rifle ($750 Retail)
and suppressor ($450 Retail)
Our Outback short barrel rifle (SBR) and detachable suppressor system is
composed of a Ruger 10/22 takedown carbine with a shortened 12" barrel, threaded to
accept both a removable backup front sight/thread protector and lightweight STEALTH-D
suppressor. Quietest performance is achieved with match, subsonic, or standard
velocity ammunition, as most high velocity loads will remain transonic and could produce a
noticeable sonic crack. The suppressor can be disassembled for cleaning. Dealers,
please send us your signed FFL for a price quote.
We also can convert a customer provided Ruger 10/22
takedown carbine for $425. Price does not include the suppressor or $200 Federal
Transfer Tax for the SBR. If being returned directly to owner, please add $200 to
cover the Federal Transfer Tax. |
PAS blued suppressed barrel ($525 Retail) or
PASS Stainless Suppressed barrel ($575 Retail)
Our Model PAS and PASS .920" diameter heavy match suppressed barrels
are for people who want to suppress their own 10/22s. Please note, if you do not
already possess a heavy barrel stock, you will need one (To order it with the suppressor,
select OPTIONS). You
can attach the suppressed barrel and stock yourself in under five minutes and switch back
and forth between configurations. With the PAS or PASS attached to your rifle, you
will have an accurate and quiet firearm. Use of lead bullets is acceptable, though
metal plated, unwaxed bullets will create less fouling. Quietest performance is
achieved with match, subsonic, or standard velocity ammunition, as most high velocity
loads will remain transonic and could produce a noticeable sonic crack. In all cases
sound reduction is on par with any other suppressed .22 rifle on the market. The
noise generated is similar to that of a BB gun or air rifle, depending upon the type of
ammunition used. Cleaning is easily accomplished without the need for disassembling
the suppressor. Dealers, please send us your signed FFL for a price quote.
We also can convert a customer provided unfluted 1022 or
K1022 .920" bull barrel, starting at $475 for the PAS configuration, and $525 for the
PASS configuration. Prices include return shipping to your dealer, but do not
include the Federal Transfer Tax. |
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HARPO II suppressor and rifle (not shown)
$875 Retail
HARPOS II stainless suppressor and rifle
(scope not included) $875 Retail
(Back by popular demand in an improved
model)
The HARPO II and HARPOS II respectively, are built on Ruger 10/22 and
K10/22 actions. Named in honor of the Greek God of Silence, Harpocrates, these are
the quietest semiautomatic rifles we build. The barrel is sleeved and ported to
allow gas bleed early in the suppression process. This reduces gas pressure,
preventing most high velocity cartridges from going transonic or supersonic. Now
available with the option to open or close the gas bleedoff ports. The rifle comes
standard with either a black synthetic or laminated stock, depending upon
availability. An optional 4x32 scope with ring mounts and base is available. Dealers,
please send us your signed FFL for a price quote
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CLANDESTINE II blued suppressed barrel ($675
Retail) or CLANDESTINES II Stainless Suppressed barrel ($675 Retail)
Our Model CLANDESTINE and stainless CLANDESTINES 1" diameter ported and
suppressed barrels are for people who want to suppress their own 10/22s.
Please note, if you do not already possess a heavy barrel stock, you will need one (To
order it with the suppressor, select OPTIONS).
You can attach the suppressed barrel and stock yourself in under five minutes and switch
back and forth between configurations. The barrel is sleeved and ported to allow gas
bleed early in the suppression process. This reduces gas pressure, preventing high
velocity cartridges from going supersonic. Accuracy remains unaffected. Now
available with the option to open or close the gas bleedoff ports.With the suppressed
barrel attached to your rifle, you will have an accurate and quiet firearm. Use of
lead bullets is acceptable, though metal plated, unwaxed bullets will create less
fouling. Quietest performance is achieved with subsonic or standard velocity
ammunition, but most high velocity loads also will remain subsonic (Warning: Hypervelocity
rounds such as CCI Stinger may still produce a loud sonic crack). In all cases sound
reduction is on par with any other suppressed .22 rifle on the market. The noise
generated is similar to that of a BB gun or air rifle, depending upon the type of
ammunition used. Disassembly and cleaning are easily accomplished. Dealers,
please send us your signed FFL for a price quote.
We also can convert a customer provided Ruger 10/22 or
K1022 barrel, starting at $650 for either the CLANDESTINE II or CLANDESTINES II
configuration. Price includes return shipping to your dealer, but does not include
the Federal Transfer Tax. |
SNIPER (Savage
MKII-FV with synthetic stock, internally suppressed) $700 Retail
The SNIPER suppressed barrel is mounted on a Savage Mark II series bolt
action .22 rifles. Like its name implies, this rifle is very accurate. Its
also the quietest suppressed firearm we make. Barely a whisper is heard when it
fires. This is due to the lack of mechanical noise and back pressure associated with
the operation of semiautomatic suppressed firearms. The suppressor is internal and
does not require removal for cleaning. An optional 4x32 scope with ring mounts and
base is available. Dealers, please send us your signed FFL for a price
quote. |
SNIPER -L (Savage MKII-BV with laminate stock, internally
suppressed, scope not included) $750 Retail
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SNIPER-TH (Savage MKII-BTV with laminate thumbhole stock,
internally suppressed) $775 Retail |
SNIPER-THS (Savage MKII-BTVS with laminate synthetic stock and
stainless steel, internally suppressed) $800 Retail |
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SNIPER-P (Savage MKII-FVT with peep target iron sights,
synthetic stock, internally suppressed) $775 Retail
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HUNTER II suppressor and semiautomatic
rifle (shown with optional 4x scope) $700 Retail
The HUNTER II suppressed barrel is mounted on a Savage 64BTV semiautomatic
.22 rifle. It is more economically priced than the suppressed Ruger 10/22
series, yet sound suppression and accuracy are on par with it. The rifle functions
with all types of .22 ammunition and will not crack supersonic with subsonic ammo and most
standard velocity or targe ammo. The suppressor is internal and does not require
removal for cleaning. The rifle comes with a two-piece Weaver type base. An optional
4x32 scope with ring mounts is available. Dealers, please send us your
signed FFL for a price quote. |
| MARLIN
NIMROD II suppressor and semiautomatic carbine (shown with
optional 4x scope) $750 Retail
NIMRODS II stainless version (not shown) $775 Retail
Mounted on a Marlin 795 semiautomatic .22 carbine, the NIMROD II uses a
sleeved barrel which is ported to allow gas to bleed early in the suppression
process. This reduces gas pressure, preventing most high velocity cartridges from
going transonic or supersonic. It also is available with the option to open or close
the gas bleedoff ports. This handy combination incorporates our smallest and lightest
internal suppression system in its 18" barrel. Despite its size, the NIMROD is
both quiet and accurate with a wide range of ammunition. The suppressor tube can be
removed for cleaning. An optional 4x32 scope with ring mounts is available. |
MARLIN
ORION II suppressor and bolt action rifle $625 Retail
The ORION II is a suppressed barrel mounted on a seven-shot bolt action
Marlin XT-22VR rifle. Standard Marlin features include an ergonomically designed
black synthetic stock, stippled pistol grip with palm swell, beaver tail forend, thumb
activated safety, Pro-Fire™ adjustable trigger, blued heavy varmint barrel with
Micro-GrooveŽ rifling (16-grooves), swiivel studs, grooved receiver for scope mount,
drilled & tapped receiver, rear & front scope bases. This rifle is as
accurate and quiet as our SNIPER model. The suppressor does not require removal for
cleaning.
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COVERT
suppressor and rifle and soft shell case (shown with optional 4x scope) $900 Retail
The COVERT is a suppressed Marlin Model 70PSS "Papoose" stainless
takedown rifle that comes with a soft zipper case. It is comparable in size and
performance to the suppressed AIR COMMANDO (Henry AR-7). The suppressed stainless
barrel can be removed for ease of cleaning. An optional 4x32 scope with ring mounts
is available. Dealers, please send us your signed FFL for a price quote.
We also can convert a customer provided Marlin 70PSS for
$650. Price includes return shipping to your dealer, but does not include the
Federal Transfer Tax. |
AIR COMMANDO suppressor and rifle
(shown with optional 4x scope and mount) $725 Retail (silver finish
not currently available)
AIR COMMANDO suppressed barrel only, $500 Retail
The AIR COMMANDO is a Henry AR-7 Survival Rifle rifle that comes with both the
original barrel and a suppressed .22 barrel. It is comparable in size and
performance to the suppressed COVERT (Marlin 70PSS). The suppressed barrel can be
removed for ease of cleaning. An optional 4x32 scope with ring mounts is
available. Dealers, please send us your signed FFL for a price quote.
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| ARTEMIS
suppressor and rifle (shown with optional 4x scope) $700 Retail
The ARTEMIS suppressed barrel is mounted on a Remington 597-HB .22 rifle. It is
comparable in size and performance to the PAT (Ruger 10/22T), only more economically
priced. The suppressor does not require removal for cleaning. An optional 4x32
scope with ring mounts is available. Dealers, please send us your signed FFL
for a price quote.
We also can convert customer provided Remington 597-HB
for $550. Price includes return shipping to your dealer, but do not include the
Federal Transfer Tax. |
COMING
SOON: PLINKER suppressor and rifle (shown with optional
4x scope) $685 Retail
The PLINKER is a suppressed Henry Mini Bolt single-shot bolt action .22
youth rifle. It is the smallest suppressed rifle we offer, and is suitable as a
training rifle for beginning shooters of small stature. Dealers, please send
us your signed FFL for a price quote. |
MEASURING THE SOUNDS OF SILENCE
WARNING! Determining
the effectiveness of a suppressor is one part science, one part art, and one part PR (or
BS, depending upon your viewpoint). If math bores you or gives you a headache, then
you may want to skip the next few paragraphs. If you are glutton for punishment, or
really want to understand some of the voodoo and incantations associated with sound
pressure measurements, then read on. For those of you with an advanced appreciation
of mathematics and physics, the author must apologize in advance for keeping the following
explanations simple and incomplete. Now for the hard part.
The standard unit of
measurement for sound pressure level (loudness) is the decibel (dB, or 1/10th of a
bel). The term bel, and by extension, the decibel, was created in the 1920s by
engineers at the Bell Telephone Laboratories, and named in honor of the father of the
telephone, Alexander Graham Bell. Essentially, it was the renaming of a unit of
measure previously developed and refined over the years for the purpose of determining the
lowest audible reduction in sound the average human ear could detect through a telephone
line. The longer a telephone line is, and the more switches the signal passed
through, the greater the detectable loss of sound, so the decibel proved to be a useful
measurement for determining the efficiency of lines and switches, as well as the power
levels required to keep a sound reasonably audible. As a result, decibels are used
in other branches of science, most notably electronics, but for our purposes this
discussion is limited to its application in acoustics.
The decibel is a
representation of the ratio of the intensity of a sound to a stated baseline reference,
and therefore can be subjective. That is, whatever sound is used to form the
baseline reference also determines the resulting decibel readings. If a whisper
forms the baseline reference, the dB reading for a shotgun muzzle blast will be higher
than if a Tarzan yell forms the baseline reference. Fortunately, a standard sound
pressure level of .0002 microbar (or 20 micropascals if you prefer), is the accepted
standard for 0 dB. A "bar" approximates the atmospheric pressure on Earth
at sea level, and a microbar is one millionth of a bar. Micropascals are equivalent
but much smaller units of measure (one bar equals 100 billion micropascals).
Although the decibel has never been standardized by the International Committee for
Weights and Measures, it remains in common use by the manufacturers of sound measuring
devices. All else being equal, differences in any readings obtained by each device
most likely can be attributed to calibration errors or manufacturing quality
variances.
Because it is a ratio, the
decibel is expressed as a logarithm. You may recall from grade school math that a
logarithm is represented as an exponent (the raised number) of another number (called the
base), such as in the following example where the base number is 2.
22 = 2×2 = 4
23 = 2×2×2 = 8
24 = 2×2×2×2 = 16 25 = 2×2×2×2×2 = 32...........210
= 2×2×2×2×2×2×2×2×2×2 = 1024
In the preceding example, 22 is the logarithm for the value 4, just as 210 is
the logarithm for the value 1024. Note the great difference in actual values these
two logarithms represent. The last one is not simply five times larger than the
first one, it is 512 times larger. So as a logarithm increases arithmetically (2, 3,
4, 5...10), its value grows exponentially (in this example, 4, 8, 16, 32...1024).
If we use a larger base value, such as 10
(which just happens to be the base value of bels and decibels), the differences are far
more dramatic.
102 = 10×10 = 100
103 = 10×10×10 = 1000
104 = 10×10×10×10 =
10,000 105 = 10×10×10×10×10
= 100,000...........1010 =
10×10×10×10×10×10×10×10×10×10 = 10,000,000,000
The following table is an example
comparing dB levels from 0 to 100 with their equivalent values expressed as power ratios
and amplitude ratios (measure of proportional change in sound wave pressure).
| dB |
power ratio |
amplitude ratio (proportional change
in sound wave pressure) |
| 100 |
10,000,000,000x |
100,000 |
| 90 |
1,000,000,000x |
31620 |
| 80 |
100,000,000x |
10,000 |
| 70 |
10,000,000x |
3162 |
| 60 |
1,000,000x |
1000 |
| 50 |
100,000x |
316.2 |
| 40 |
10,000x |
100 |
| 30 |
1000x |
31.62 |
| 20 |
100x |
10 |
| 10 |
10x |
3.162 |
| 0 |
1x |
1 |
Since firearms create sound pressures well
above 100 dB, the raw numbers would become quite huge if the dB scale wasn't applied.
The threshold for permanent hearing damage is generally considered to be 120 dB
(one trillion times greater than 0 dB), so dropping a firearm's report below this
number is sometime seen as the Holy Grail of sound suppressors. Of course, it isn't
really all that simple. Other factors come into play such as the frequency range
involved and the duration of the sound pressure. The latter is of importance because
one sound pressure may be perceived as being louder than another simply because it has a
greater duration, regardless of the actual dB reading. A 135 dB sound that lasts a
microsecond is likely to be perceived as quieter than a 130 dB sound that lasts a half
second. Interpreting dB values can be further confusing because, even though a
single dB number increase corresponds to a logarithmic increase, at the extreme pressure
ranges involved, the human ear is not always able to detect these changes. On
average, a firearm's sound pressure must drop 6 dB before the change is detected by the
human ear. Even if the subjective human factor is eliminated, test results by
"impartial" scientific analysis can be affected by many factors, including test
location (indoor range, wooded area, open field), ambient temperature, ammunition
selection, type of firearm, barrel length, placement of the microphone, or brand, model,
and calibration of the acoustic measuring device. In the final analysis, raw data,
testimonials, recorded video, or sound demonstrations are not conclusive evidence of
suppressor performance. But short of being there and shooting the suppressor
yourself, they may be all you have to go on.
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