Gemtech SHIELD Installation guide

TM-SHIELD
OPERATION AND MAINTENANCE
OF SOUND SUPPRESSOR
MODEL SHIELD
Before using this suppressor,
be certain you have read and
understand this manual.
Manufactured by
GEMTECH
Div. of Gemini Technologies, Inc.
P.O. Box 140618
Boise, Idaho 83714
ISSUED:Feb2015

COPYRIGHTNOTICE:
©2015 Gemini Technologies, Inc.
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 the prior written permission of the
copyright owner.
Manufacturedby
GEMTECH
Division of Gemini Technologies, Inc.
P.O. Box 140618
Boise, Idaho 83714-0618
Phone: [phone]
FAX: [phone]
IMPORTANT
The manufacturer disclaims any liability for damages resulting from
any unauthorized modification of this product. Any modification of this
suppressor without prior express authorization from Gemtech’s Engi-
neering Department will void all warranties, both written and implied,
and will result in the assumption of all liability by the person perform-
ing the unauthorized modification.
CONTENTS:
GeneralDescription.........................................................................P. 2
AblativeWarning .............................................................................P. 2
AmmunitionRecommendations ......................................................P. 2
Safety Notes ...................................................................................P. 3
Physical Specifications ...................................................................P. 3
QuickmountInstallationand Barrel threading ..................................P. 4
SuppressorMounting/Dismounting..................................................P. 4
MaintenanceandCleaning ..............................................................P. 5
Warranty Statement ........................................................................P. 5
ReturnInstructions ..........................................................................P. 6

SOUNDSUPPRESSORSHIELD P.
GENERAL INFORMATION
The SHIELD suppressor is one of the family of Gemtech Extreme Duty
Silencers specifically designed to withstand the rigorous SOCOM military
standards for today’s harshest environments. Its lightweight titanium and
inconel construction exhibits greater strength than regular stainless steel
suppressorsandwilloutlastmostcompetitors’stampedbaffles for prolonged
engagements.Forweight,durability, and performance, the SHIELD suppres-
soris unparalleled.
ThemodelSHIELDsoundsuppressor is offered inGemtech’spatented
Quickmount quick-detach mounting system. Quickmount flash hider and
muzzle brake mounts are available in a wide variety of threads to fit a wide
varietyof weapons andmuzzlethreads.
All muzzle attachments, including suppressors, will change barrel har-
monics and standing waves resulting in a slight change in point of impact
with the device in place. Because of its light weight, there is less point-of-
impact shift than most comparable sized suppressors for this caliber. The
degreeofchangeinthe point of impact willvarywiththespecificweaponand
boththerigidityandmetallurgyofthebarrel.Whenusedwithstandardweight
law enforcement or military grade barrels, there will be no deleterious effect
on group size.
Thissuppressoriseffectiveinmarkedlyreducingthesoundofthemuzzle
blast,makingitdifficultfor an observer todeterminetheoriginoftheshot and
reducingtheneedforshooterhearingprotection.There is no way ofeliminat-
ing the ballistic crack (or sonic boom) of the projectile traveling downrange.
Thissuppressorcontainsnoexpendableparts.Werecommendagainst
cleaning the interior of the suppressor. This instruction manual gives the
necessary instructions for maintenance of this unit.
USE OF ABLATIVE AGENTS (ARTIFICIAL ENVIRONMENT)
Do not fire this suppressor with any foreign material inside. This sup-
pressorisdesignedto operate completelydry.Introductionofliquids,greases,
orotherforeignmaterials can causeabnormalpressuresandmust never be
used.Any resultant damage is not covered under warranty.
AMMUNITION
TheSHIELDsuppressorisdesignedtooperatewithNATOspecification
5.56x45 NATO cartridges. It is not intended to be used with handloaded or
foreign ammunition that exceed SAAMI or NATO pressure specifications.
The 5.56 cartridge is unique in that it contains a small mass of lead in
2

SOUNDSUPPRESSORSHIELD P.
SPECIFICATIONS
Caliber: 5.56x45NATO(.223 Remington)
Length: 7 inches
Diameter: 1.5 inches
Weight: 15.3ounces
Materials: Titanium and inconel alloys
Finish: BlackHighTemperature Cerakote
Mount QM Flash Hider or QM Muzzle
Brake(not included)
MinumumBarrelLength: 10.3 inches
Duty Cycle Limited FullAuto
(see ammunition section)
the core and a large surface area of copper jacket.After about 100 rounds
fully automatic or rapid semi-automatic fire, the bore temperature will ex-
ceed 800°F and the bullet core will soften causing bullet instability, exces-
siveyaw,and probable bafflestrikes.
SAFETY NOTES
1. Always handle weapons in a safe manner and assume they are
loadeduntilthey have beencleared.
2. User installation or removal of the sound suppressor must be ac-
complishedinaccordance with theinstructionscontained in this
book.
3. Operating Temperatures: During use, the SHIELD suppressor
absorbslargequantitiesofheatfromtheburningpropellantgases.
The elevated temperatures can pose a hazard to person-
nel and materials that may contact the suppressor when
hot, and the suppressor must be allowed to cool to ambi-
ent temperature before handling.
4. Only use the suppressor completely dry.
5. Before performing any installation or maintenance opera-
tion, 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.
3

SOUNDSUPPRESSORSHIELD P. 4
MOUNTING the SHIELD
Position the suppressor over the Quickmount and rotate until the lugs
enter the rear portion of the suppressor. Compress the internal spring and
rotate the suppressor body ¼ turn clockwise (as viewed from the front) until
the lugs engage recesses in the rear of the suppressor locking it in place.
Duringuse,suppressors will becomeextremelyhot. Do nottouch!Fail-
ure to comply may result in burns or melted clothing. With as few as 100
rounds fully automatic fire, the suppressor can reach 800°F and can melt or
igniteflammable materials.
Removal is the reverse of installation: press the suppressor rearward
compressing the spring, rotate ¼ turn counterclockwise, and remove.
MOUNTING THE QUICKMOUNT
The SHIELD suppressor was gauged for alignment and run-out on a
precisiontestfixturebeforeshipping from the factory.Toensure proper align-
ment, it is imperative that the Quickmount Flash Hider or Muzzle Brake be
mounted correctly on the weapon to maintain concentricity.
Unthreadedbarrelsneedtobethreadedbyaqualifiedmachinist.Gemtech
offersand warrantsthreading and Quickmount mountingservices.To ensure
concentricity, it is important that the barrel be threaded with the threads
coaxialwiththebore and theshoulderattheback of thebarrelbeexactly 90°
to the bore axis. A small (0.06”) thread relief is incorporated into the rear of
the Quickmount.Athread relief in the barrel at the back of the threads is not
recommended if shim or peel washers are to be used.
1. Thorough degreasing of the male threads on the barrel and the female
threads in the Quickmount is essential. Acetone or TCE is the preferred
solvent.
2. The Quickmount Muzzle Brake requires timing. The Quickmount Flash
Hider ideally is tightened against the shoulder at the back of the threads.
3. If timing is required, fit using only a shim washer set (available from
Gemtech) or a peelwasher. Never use a crush washer or lockwasher.
Use of a crush washer or lockwasher will guarantee misalignment, baffle
damage,andvoid the warranty.
4. Once fitted, place 4 drops of Rocksett®ceramic adhesive on the threads
and torque to 35-45 ft-lbs.

SOUNDSUPPRESSORSHIELD P. 5
CLEANING
The SHIELD suppressor is constructed of 100% corrosion resistant ti-
tanium and inconel. As such, there is no concern about corrosion from the
products of combustion of the propellant gases. We have found no need
for cleaning the inside of the suppressor. We strongly advise against
such efforts or immersion in solvents. Solvents will not drain completely
and residual liquid may cause unexpected pressure peaks which can dam-
age the unit. The high flame temperature burns out the majority of any re-
mainingpowderresidues.
Allmounting/alignmentsurfacesshouldbeinspectedand remain clean.
Theymaybe cleaned withabrassbrushor ¾ inchcopperpipebrushdipped
in CLP.
Unlike firearms, it is neither necessary nor desirable to clean centerfire
rifle suppressors. It is acceptable to blow out particulate matter with high
pressurecompressed air.Do not, underanycircumstances,attempt to pass
a cleaning patch through the suppressor.
HUNTING NOTICE
Althoughmorestates are permittinghuntingwithsuppressors,it is sug-
gested that the local state Fish & Game Department be consulted for the
most recent changes in the law.
LIMITED WARRANTY STATEMENT
Gemini Technologies, Inc., dba Gemtech, warrants to the initial retail
purchaser that Gemtech products will be free of defects in workmanship or
material and that the product meets manufacturing specifications at the
timeof manufacture.This warranty islimited to therepair or replacementof
theproduct. This expresslimitedwarrantyis exclusive andnoother express
orimplied warranty isotherwise provided.
GEMTECHMAKESNOWARRANTY OF MERCHANTABILITYOR
FITNESS FOR PARTICULAR PURPOSE.
Product technical specifications and/or designs may be changed
without notice. This warranty does not cover negligence, misuse, careless
orimproper handling and/oroperation,abuse, unauthorizedadjustmentsor
modifications, improper mounting/installation, ordinary wear and tear, the
failureto follow manufacturerinstructions and/or theuse of inappropriateor
defectiveammunition.

SOUNDSUPPRESSORSHIELD P. 6
Gemtech shall have no liability for incidental or consequential
damages and under no circumstances will Gemtech 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 a Damaged Suppressor
If a suppressor is damaged due to a manufacturing defect once it has
beenfired,itmaybereturnedtoGemtech for repair or replacement. Determi-
nation 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 cus-
tomer to cover shipping costs and insurance to return the suppressor to
Gemtechfor inspection orrepair.Gemtech will payany reasonable shipping
and insurance costs to return the unit to you.
To assure proper legal procedures for any repair returns, fill out and pro-
vide a copy of the General Service Form with any packages sent to us.
(Visitgem-tech.com,navigate to CustomerSupport/Returnand Repair Poli-
ciestodownloadthefillableGeneralServiceForm.pdforcall208.939.7222)
BATFE no longer requires transfer on a Form 5 to the manufacturer for
repair. BATFE does require a letter accompanying the suppressor detailing
therepairsormodificationsrequired(satisfiedbyacompletelyfilledout Gen-
eral Service Form). BATFE also requires proof of ownership satisfied by a
photocopy of the front of the owner’s Form 3, 4, or 5.
NOTE: BATFE prohibits transferring the serial number to a new outer
tubeinthecaseofdamageto the tube. Tube damage renderingthesuppres-
sorunsafe willrequire a newsuppressor.

All Gemtech products are
100% manufactured in the
United States of America.