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SOUND SUPPRESSOR MODEL OASIS
INSTALLATION
If you do not have a copy of the instruction manual for the underlying
Ruger weapon (MK2, MK3, 22/45, 10/22, or 77/22), one is available at no
charge from: Sturm Ruger & Co, Inc., Southport, CT 06490.
To install the pistol version of the OASIS, field strip the pistol following
Ruger's printed instructions. Re-assemble using the OASIS suppressed
aluminum upper receiver in place of the original Ruger barreled receiver.
To install the OASIS-R suppressed barrel, remove the receiver from the
stock and remove the barrel from the receiver according to Ruger's printed
instructions. The barrel is retained by two 3/16 inch hex cap screws. The
Oasis-R barrel should be a snug hand fit and not require force. If necessary
the shank may be lightly sanded with some 320 grit emery paper. When
installing the new barrel, torque the cap screws to 30 inch-lbs.
AMMUNITION RECOMMENDATIONS
For optimum terminal ballistics, the barrel is not ported to reduce ve-
locity. While most high velocity .22LR ammunition will remain subsonic in
the OASIS pistol, we strongly recommend the use of Gemtech Subsonic
or CCI standard velocity ammunition for both the pistol and rifle versions.
High velocity ammunition will be supersonic in the rifle version, generating
a ballistic crack of the supersonic projectile. The weapons will function reli-
ably with subsonic or standard velocity .22 rimfire ammunition.
The Aguilla SSS 60 gr. subsonic ammunition does not always
stabilize in barrel twists readily available and can yaw badly on exit
from the rifling. This will seriously damage the internal components
of your suppressor, and use of this ammunition is at the user's risk
and will void the warranty.
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.
CLEANING and MAINTENANCE
The design of the OASIS series allows for maintenance without
disassembly. There are no solvents that will dissolve carbon, and the use
of solvents may cause clumping and solidification of powder residues.
DANGER
P.
3
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