hpp-manual-rimfire-2

The RIMFIRE2, 22 caliber direct thread mount suppressor is mini-suppressor. The RIMFIRE2 is approved for use with ANY rimfire cartridge 17 through 22 Mag.  The RIMFIRE2 is not the quietest suppressor but it is by far the smallest available. For its size the sound reduction is pretty livable, you do not need to use hearing protection using this suppressor but there is a noticeable pop. The cool factor is way up there with its just over 2 inch total length.  We have been building the highest quality suppressors for law enforcement and sportsmen for 10 years. Our company has been built on quality, integrity and customer satisfaction.

“RimFire 2″ ”
OPERATION AND MAINTENANCE OF
“RimFire 2” SOUND SUPPRESSOR
Before using this suppressor
be certain you have read and
understand this manual.
Hughes Precision Products LLC
Indian River, Michigan 49749
ISSUED: 2016
Sound Suppressor “RimFire 2”
Hughes Precision Products LLC
Indian River, MI 49749
www.hughesprecision.com
IMPORTANT
The manufacturer disclaims any liability for damage resulting from any
unauthorized modification of this product. Any modification of this
suppressor without prior express authorization from Hughes Precision
Products LLC Engineering Department will void all warranties, both
written and implied, and will result in the assumptionof all liability by
the person performing the unauthorized modification.
COPYRIGHT NOTICE:
Hughes Precision Products LLC
All rights reserved. The contents of this publication may not be
reproduced in any form or by any means in whole or in part
without theprior written permission of the copyright owner.
Sound Suppressor “RimFire 2”
GENERAL INFORMATION
The “RimFire 2” suppressor is one of the family of Hughes Precision Products
LLCs Extreme Duty Silencers specifically designed to withstand the rigorous
standards for todays harshest enviroments. Its tough 7075 and 6061 grades
aluminum construction exhibits great strength than for prolonged engagements.
For strength, durability and performance the “RimFire 2” suppressor is
unparalleled.
The “RimFire 2″ sound suppressor is offered in standard 1/2”-28 (2A) thread mount
only.
All muzzle attachments, including suppressors, will change barrel harmonics and
standing waves resulting in slight change in point of impact with the device in
place. The degree of change in the point of impact will vary with the specific
weapon and both the rigidity and metallurgy of the barrel. When used with
standard weight varmint, law enforcement or military grade barrels, there will be no
detrimental effect on group size.
This suppressor is effective in manifestly 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 eliminating the
ballistic crack (sonic boom) of the projectile traveling downrange.
This suppressor contains no expendable parts. We recommend against cleaning
the interior of the suppressor. This instruction manual give the necessary
instructions for maintenance of this unit.
DO NOT fire this suppressor with any foreign material inside. This suppressor is
designed to operate completely DRY. Introduction of liquids, greases or other
foreign materials can cause abnormal pressures and must NEVER be used. Any
resultant damage is not covered under warranty.
AMMUNITION
The “RimFire 2” suppressor is designed to operate within SAAMI or NATO
pressure specifications. It is not intended to be used with handloaded or other
ammunition that exceed SAAMI or NATO pressure specifications.
Sound Suppressor “RimFire 2”
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 accomplished in accordance
with the instructions contained in this manual.
(3) During use, the “RimFire 2″ suppressor absorbs large quantities of heat from the burning
propellant gases. The elevated temperatures can pose a hazard to personnel and materials that may
contact the suppressor when hot. The suppressor must be allowed to cool to ambient temperature
before handling.
(4) ONLY use the suppressor completely dry.
(5) NEVER use any type of washer, crush washer or locking washer when mounting the
suppressor
(6) Before performing any installation or 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.
SPECIFICATIONS
Caliber:
Length:
Diameter:
Weight:
Materials:
Finish:
Mount:
Duty Cycle:
RimFire 2
2.0″
1.0”
3 ounces
7075/6061 Aluminum
Flat Black ~ Dura-Coat
1/2-28 (2A) Threads Only
Bolt, Semi-Auto or BURST
FULL AUTO
Sound Suppressor “RimFire 2”
BARREL THREADING
The “RimFire 2″ suppressor was gauged for alignment and run-out on a precision test fixture before
shipping from the factory. To ensure proper alignment, it is imperative that the barrel be threaded
properly.
For unthreaded barrels, please refer to the drawing below. To ensure concentricity and axial alignment,
it is important that the barrel be threaded with the threads coaxial with the bore and the shoulder at the
back of the threads/barrel be exactly 90 Degrees to the bore axis. (see drawing below)
A small (.060″ -.080″) thread relief is incorporated into the rear mount of the suppressor. A thread
relief in the barrel at the back of the threads is optional, but recommended.
Thread 1/2-28
Class 2A fit
0.600±0.025”
.498”
MOUNTING THE “RimFire 2”
If present remove the thread protector. Installation reqiures that the suppressor be screwed hand
tight onto the threaded barrel. The threads are standard right hand.
NEVER use any type of washer, crush washer or locking washer when mounting the
suppressor.
Crush washers or lockwashers will cause misalignment and damage not covered by
warranty
During use, suppressors will become extremely hot. Do not touch! Failure to comply may result
in burns or melted clothing.
To remove the suppressor, UNSCREW the suppressor and replace the thread protector.
Sound Suppressor “RimFire 2”
CLEANING
The “RimFire 2” suppressor Core is constructed of 100% 7075 Aluminum and 6061 grade
aluminum outter tube. As such there is little concern about corrosion from the products of
combustion of the propellant gases. We have found little need for cleaning the inside of the
suppressor. We strongly advise against such efforts or the immersion in solvents. Solvents will
not drain completely and residual liquid may cause unexpected pressure peaks which can
damage the unit. The high flame temperature burns out the majority of any remaining powder
residues.
All threads, mounting surfaces and alignment surfaces should be inspected and remain clean.
They may be cleaned with a brass or nylon brush dipped in mild solvent.
It is acceptable to blow out particulate matter with high pressure compressed air. DO NOT
under any circumstances, attempt to pass a cleaning patch through the suppressor.
FOR DISASSEMBLY AND OPTIONAL CLEANING INFORMATION (GO TO LAST
PAGE OF THIS MANUAL)
LIMITED WARRANTY STATEMENT
Hughes Precision Products LLC warrants to the initial retail purchaser that Hughes Precision
Products will be free of defects in workmanship or material and that the product meets
manufacturing specifications at the time of manufacture. This warranty is limited to the repair or
replacement of the product. This express limited is exclusive and no other express or implied
warranty is otherwise provided.
HUGHES PRECISION PRODUCTS LLC MAKES NO WARRANTY OF
MERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE.
Product techinical specifications and/or designs may be changed without notice. This warranty
does not cover negligence, misuse, careless or improper handling and/or operation, abuse,
unauthorized adjustments or modifications, improper mounting/installation, ordinary wear and
tear, the failure to follow manufacturer instructions and/or the use of inappropriate or defective
ammunition.
Sound Suppressor “RimFire 2”
LIMITED WARRANTY STATEMENT
Hughes Precision Products LLC shall have no liability for incidental or incidental or
consequential damages and under no circumstances will Hughes Precision Products LLC be liable
for personal injury, property damage or economic loss.
This warranty and disclaimer is subject to all applicable laws some of which may limit these
terms.
WARRANTY REPAIRS: Return of damaged suppressor
If a suppressor is damaged due to a manufacturing defect once it has been fired, it may be returned
to Hughes Precision Products LLC for repair or replacement. Determination to repair or replace is
made solely at our discretion and only after we have had the opportunity to examine and
determine that the cause of the damage is due to a manufacturing defect. It is the responsibility of
the customer to cover shipping costs and insurance to return the suppressor to Hughes Precision
Products LLC for inspection or repair. Hughes Precision Products will pay any reasonable
shipping and insurance costs to return the unit to you.
To assure proper legal procedures for any repair returns, fill out and provide a copy of the NFA
RETURN / REPAIR Form with any packages sent to us. Visit www.hughesprecision.com to
download the NFA RETURN / REPAIR Form.pdf
BATFE no longer requires transfer on a form 5 to the manufacturer for repair. BATFE does
require a letter accompanying the suppressor detailing the repairs or modifications required
(satisfied by completely filling out the NFA RETURN / REPAIR Form). BATFE also requires
proof of ownership satisfied by a photocopy of the front of the owners Form 3, 4, or 5.
NOTE: BATFE prohibits transferring the serial number to a new outer tube in the case of damage
to the tube. Tube damage rendering the suppressor unsafe will require a new suppressor.
HUGHES PRECISION PRODUCTS LLC
manufactures all of its products
in the
UNITER STATES of AMERICA
Sound Suppressor “RimFire 2″
DISASSEMBLY STEPS:
1. ENSURE YOUR FIREARM IS NOT LOADED
After ensuring that your firearm is not loaded, remove the suppressor from the firearm. You CANNOT take
it apart while its still attached to the firearm.
2. SOAK THE SUPPRESSOR
The can should be soaked prior to disassembly to aid in disassembly. We recommend CRC or WD40 in a
large plastic jar and leave it in to soak overnight. Spraying some oil into the can will be of minimal to no
benefit. Soak it. After soaking, remove from the oil, drain, wash the exterior to remove any oil, dry the
exterior.
3. REMOVE ONE ENDCAP
You will need one Assembly & Disassembly Tool to unscrew the front cap. Grasp the suppressor in your
hand or use a fiber, rubber or nylon strap wrench. Place the tool on the top of the suppressor. Loosen the cap
unscrewing first only about 1/4 to 1/2 of a turn. Completely remove the top cap, then either by hand or with
the strap wrench
4. REMOVE BAFFLES FROM TUBE
The core could be difficult to remove from the tube since the lead has soldered them together and into the
tube. Use a 3/4” diameter wooden dowel cut 7 inches long to tap / hammer the baffles out. The easiest and
safest way to accomplish this is to have your buddy hold the tube in the air while you use the dowel and a
plastic face lead dead-blow hammer to tap the core out,
5. CLEAN THE TUBE ID & INSIDES OF BOTH CAPS
Use a soft brush to clean the inside of the tube so that you can slide the core back in for reassembly. Do not
use any hard brushes that will damage the finish inside of the suppressor tube. Similarly, do not use any
solvents or cleaners with ammonia or similar that will dissolve aluminum. Scrub the insides of the cap. Do
not scrub the threads. After a lot of use, it may become necessary to clean the 1/2×28 thread with a class 2B
tap. A tap can be purchased on line from Brownells. Use caution when chasing the threads with a tap since
the tap is capable of incorrectly cutting new threads in the cap. The tap should by used by hand only to clean
the existing threads if necessary.
6. CLEAN THE BAFFLES
The core will never be shiny aluminum and it doesn’t need to be. The preferred method of cleaning is to use
a brass bristle brush until all of the lead and carbon has been removed.
7. REASSEMBLY
Reassembly is the reverse process of disassembly. Apply a small amount of an anti-seize compound to the
cap threads before assembly. Slide core into tube, screw end cap into place and tighten to 35-40 inch pounds
of torque. Apply a small amount of anti-seize to the 1/2”-28 mounting threads and remount to your weapon.
Job Done.