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SOUND SUPPRESSOR MODEL HMR and WMR
target resulting in clean kills. The .17HM2 is a necked down .22LR cartridge
with the same .17 caliber projectile as the .17HMR. Non-suppressed, both
.17 caliber cartridges and the .22 Magnum are loud (at 155 dB) and can
cause significant hearing damage.
Because this is a muzzle suppressor, there is no velocity control of the
projectile. These cartridges are supersonic and will generate a ballistic crack
(sonic boom) outside the weapon system. Subsonic ammunition does not
exist in these calibers, nor is it practical to even consider a ported integral
suppressor to reduce velocity. Considering the projectile weights, any sub-
sonic treatment would end up with the accuracy, range, and terminal ballis-
tics of a pellet pistol. The HMR and WMR are designed only for rimfire
ammunition, and must not be used with any type of centerfire ammunition.
Failure to follow installation instructions detailed in this manual
can result in potential for serious injury to the user and damage to
the weapon.
Before installing (or removing) the suppressor on the weapon, be certain
to remove the magazine, open the action, and visually ascertain that the
weapon is unloaded.
Remove the thread protector from the end of the barrel and screw the
suppressor tightly by hand onto the barrel threads.
For proper alignment, the muzzle threads must be absolutely concen-
tric with the bore and must have a 90° rear shoulder perpendicular to the
bore. We will guarantee alignment only on barrels threaded by us or gauged
by us if threaded elsewhere.
As a general rule, the weapon will need to be re-sighted in after each
removal and replacement of the suppressor. For this reason, it is fairly nor-
mal to not remove the suppressor at any time during a hunt (or even the
season). Personally owned HMR and WMR suppressors at Gemtech are not
removed during the entire prairie dog season.
Before performing any maintenance operation, always remove
the magazine from the firearm, open the action, and visually
ascertain that the chamber is empty and the weapon unloaded.
Failure to do so can result in potential for serious injury to the user
and others in the vicinity.
WARNING
INSTALLATION
WARNING
P.
3
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