General Information - Gemtech SFN-57 Operation

SOUND SUPPRESSOR MODEL SFN-57™ (5.7mm)
Failure to follow installation and maintenance instruc-
tions detailed in this manual can result in potential for seri-
ous injury to the user and damage to the weapon. Being user-
attached muzzle devices, firearm sound suppressors are subject
to improper attachment unless the proper procedures outlined in
this manual are followed.
The manufacturer is not responsible for improper usage of this product.
This product is potentially dangerous, and as such it is the user's re-
sponsibility to understand and implement its proper use. If you do not
understand the instructions in this manual, please contact the manufac-
turer for further clarification.
The SFN-57 suppressor has been designed to operate dry,
and introduction of any so-called "artificial environment" (wa-
ter, oils, greases, etc.) can cause dangerous internal pressures
with possible injury to the user and damage to the suppressor.
The Gemtech SFN-57 suppressor was designed specifically for the FN
Five-Seven pistol manufactured by FN Herstal and distributed by FNH. The
suppressor features Gemtech's high efficiency baffle stack and has been
specifically optimized for this weapon only and its 5.7 x 28 mm ammunition.
The SAR-57 differs only in that the rear mount is threaded 1/2-28 for
common US threaded carbines chambered for the 5.7x28mm cartridge.
All muzzle attachments, including suppressors, will change barrel har-
monics and standing waves. This results in a slight change in point of impact
with the device in place. The SFN-57 suppressor will have no deleterious
effect on group size.
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 eliminating the need for shooter hearing protection. There is no
way of eliminating the ballistic crack (or sonic boom) of the projectile travel-
ing downrange when using the standard SS-190 ball ammunition.
When using the SB-193 subsonic ammunition (white tip), the domi-
nant sound becomes that of the mechanical noise of the weapon and the
projectile impacting the target.
WARNING
MANUFACTURER'S DISCLAIMER
WARNING

GENERAL INFORMATION

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