Safety Notes - Gemtech PSR Operation And Maintenance

SOUND SUPPRESSOR MODEL PSR
the bullet velocity. The non-suppressed sound pressure level of this cartridge
is one of the highest of the small arms rifles other than the .50 Browning. This
suppressor is effective in markedly reducing the sound of the muzzle blast,
making it difficult for an observer to determine the origin of the shot and
reducing the need for shooter hearing protection. There is no way of eliminat-
ing the ballistic crack (or sonic boom) of the projectile traveling downrange.
By reducing the muzzle blast, the target is unable to appreciate the origin of
the shot and usually perceives the shot originating from downrange.
Besides sound suppression, there are two additional added benefits of
a sound suppressor, which are seldom mentioned. The first is that a sound
suppressor is also an exceptionally effective recoil reducer, often reducing
recoil to less than one fourth of its original magnitude. The second is that a
sound suppressor is an effective flash suppressor, and when using a night
vision device as a sight, the use of an efficient sound suppressor is almost
mandatory to keep the flash from causing excessive "blooming" on the view-
ing screen of night vision devices.
All muzzle attachments, including suppressors, will change barrel har-
monics and standing waves due to the increased weight of the accessory.
This results in a slight change in point of impact with the device in place and
usually improves grouping. The PSR suppressor and mount combination has
been carefully engineered to provide a consistent, repeatable, and predict-
able shift in point of impact. The degree of change in the point of impact will
vary with the specific weapon and the rigidity of the barrel. Extensive testing
has shown no deleterious effect on the group size.

SAFETY NOTES

1. Always handle weapons in a safe manner and assume they are loaded
until they have been cleared.
2. User installation or removal of the sound suppressor must be accom-
plished in accordance with the instructions contained in this book.
3. Any installation, or removal of the Muzzle Brake mounting system must
be accomplished by a qualified armorer in accordance with the instruc-
tions contained in this book.
4. Serious injury to the user may result from an improperly installed Muzzle
Brake and/or suppressor.
5. Operating Temperatures: During use, the PSR suppressor absorbs large
quantities of heat from the burning propellant gases. This heat is dissi-
pated by radiation, convection, and conduction. The heat buildup is par-
ticularly noticeable during rapid fire, where the temperature of the sup-
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