Gemini GEMTECH BLACKSIDE-40 Installation guide

TM-BLACKSIDE-40
OPERATION AND MAINTENANCE
OF SOUND SUPPRESSOR
MODEL BLACKSIDE-40
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: September 2007

ÕÕÕÕÕWARNING ÕÕÕÕÕ
"Because sound suppressed weapons make less noise than
non-suppressed weapons, it is easy to forget that they are still
rearms. It is of vital importance to remember that a sound
suppressed rearm is just as dangerous as a non-suppressed
one, and the same safe handling requirements apply.
TM-BLACKSIDE-40
FIRST EDITION September 2007
Published by:
ATI Star Press
Antares Technologies, Inc.
P.O. Box 140618
Boise, Idaho 83714
Phone: [phone]
COPYRIGHT NOTICE:
©2007 Gemini Technologies, Inc.
All rights reserved. The contents of this publication may not be repro-
duced in any form or by any means in whole or in part without the prior
written permission of the copyright owner.

TM-BLACKSIDE-40
OPERATIONAL MANUAL FOR
SOUND SUPPRESSOR MODEL
BLACKSIDE-40
Manufactured by
GEMTECH
Division of Gemini Technologies, Inc.
P.O. Box 140618
Boise, Idaho 83714-0618
Phone: [phone]
FAX: [phone]
GEMTECH PROPRIETARY
This document contains proprietary information of Gemtech and is submitted
to the receiver in condence. Any reproduction, use and/or disclosure of this
and/or any portion thereof is expressly prohibited without the express written
permission of Gemtech
CONTENTS:
General Description...................................................................................................... P. 2
Ammunition Recommendations............................................................................. P. 3
Installation Instructions ...............................................................................................P 3
Adjusting Point of Impact Shift................................................................................ P. 3
Articial Environment.................................................................................................. P. 4
Maintenance and Cleaning........................................................................................ P. 5
Linear Inertial Decoupler Maintenance................................................................. P. 6
Physical Specications................................................................................................. P. 7
Limited Warranty ........................................................................................................... P. 8
Repair Policy.................................................................................................................... P. 8

SOUND SUPPRESSOR MODEL BLACKSIDE-40 P.
ÕÕÕÕÕ WARNING ÕÕÕÕÕ
"Failure to followinstallation andmaintenance instructions
detailed in this manual can result in potential for serious
injury to the user and damage to the weapon. Firearm sound
suppressors are user attached firearm muzzle devices, and as
such are subject to improper attachment unless the proper pro-
cedures outlined in this manual are followed.
MANUFACTURER’S DISCLAIMER
The manufacturer is not responsible for improper usage of this
product. This product is potentially dangerous, and as such it is the
user’s responsibility to understand and implement its proper use. If
youdonotunderstandtheinstructionsinthismanual,pleasecontact
the manufacturer for further clarification.
INTRODUCTION
The model BLACKSIDE-40 sound suppressor is designed to operate
flawlessly with the majority of autoloading pistols chambered for the .40
S&Wcartridge. Itisa physicallysmall suppressorfor thesizecartridge, and
it gains its remarkable efficiency through the use of artificial environment
technology. To better understand this unit, please take a few moments to
read this manual.
Thissuppressor iscapable ofreducing the soundlevel ofthe .40S&W
cartridge by up to 30 dB through the use of the proper artificial environ-
ment.Artificial environment is defined as a consumable foreign substance
(liquid or paste) inserted into the suppressor to reduce sound by rapidly
absorbing heat from the propelling gases. Completely dry, the suppressor
is hearing safe.
There are a variety of substances which will function well as an arti-
ficial environment including light oil and automotive grease. Each has its
advantages and disadvantages, which are related to efficiency, durability,
and smoke signature. Specific artificial environment materials are dis-
cussed later.
Because of the geometry of most .40S&W handguns, the BLACK-
SIDE-40by default is providedwith the GemtechLinear Inertial Decoupler
(L.I.D.), which functions as a recoil booster. On special order, it can be
provided with a normal, non-boosted threaded endcap.
2

SOUND SUPPRESSOR MODEL BLACKSIDE-40 P.
AMMUNITION RECOMMENDATIONS
The BLACKSIDE-40 will function with all commercially available
.40S&W ammunition loaded to SAAMI specifications. Ammunition loaded
with cast lead bullets can deposit lead inside the suppressor. For this rea-
son, use only jacked bullets.
ÕÕÕÕÕWARNING ÕÕÕÕÕ
"Before installing, removing, or 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 or death to the user and others in the vicinity
ATTACHMENT TO THE WEAPON
Before installing or removing the suppressor, remove the magazine,
open the action, and visually ascertain that the weapon is unloaded.
The BLACKSIDE-40 is supplied with one of two standard threads in
the mount, depending on the weapon:
(1) 14.5x1 mm (LH): HK USP Tactical, .40 caliber
(2)9/16-24 tpifor other.40 caliberbarrels.The majorityof .40 caliber
threaded barrels manufactured in the United States use these
threads.
After removing the thread protector (if any) on the weapon, screw
the suppressor firmly hand tight. It is not only unnecessary to use tools or
grip enhancers to screw the suppressor on, but use of such devices will
accelerate wear and deformation of the threads. Periodically during use,
check to be certain that the suppressor is not unscrewing.
ADJUSTING Point Of Impact SHIFT
Any time a weight is attached to a barrel, the dynamics of the entire
weapon system are changed. Except in rare occasions, there will be a
shift in the Point of Impact (POI). Because it is not practical to re-sight a
pistol, if the POI shift is objectionable, provision is made so that it can be
adjusted so that it lies in the vertical axis (the easiest to accomodate). The
procedure is as follows:
1.be certain thatthe weaponis correctly sightedin withouta suppres-
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SOUND SUPPRESSOR MODEL BLACKSIDE-40 P.
sor in place. At this time, adjust sights as necessary.
2. Install the suppressor and shoot another group. Note where the
group center is located with respect to the non-suppressed group. If there
is no shift, you are through.
3. If the POI shift is not in the vertical axis, note the approximate
amount of rotation and direction that will be required to place the group in
the vertical axis.
4. With the weapon unloaded and the action locked open, hold the
pistol with one hand, pull out the suppressor with the other hand until at the
limit of the spring.
5. Rotate the suppresor by the amount determined in step 3 above and
release tension so that the suppressor snaps back into position.
6.Repeat shooting agroup foraccuracy. It maybe necessary torepeat
steps 3, 4, and 5.
CHARGING THE ARTIFICIAL ENVIRONMENT:
Light liquids can be inserted through the rear of the suppressor with
a squeeze bottle. The correct amount is about 1/2 teaspoon (2.5 cc). The
baffle system is designed to hold liquids and will do so up to a day.
Lightoilsare bestsquirtedinto therearof thesuppressorwith a squeeze
bottle or from an aerosol dispenser. When using oil, it is not necessary to
coat the entire inside of the suppressor. It is acceptable to squirt it into the
rear 2 baffle areas only.
Greases,at thistime, arebest “spooned”into therear ofthe suppressor
with a small wood or plastic applicator. Grease is ONLY introduced into the
rear chamber. Shooting the weapon will distribute the grease throughout
the remainder of the suppressor. DO NOT pack the entire suppressor with
grease. Alternatively, grease can be inserted from the front with a long ap-
plicator attached to a hand-operated grease gun. The proper amount will be
instilled with approximately 6 strokes of a hand grease gun.
DO NOT OVERFILL the suppressor with grease or liquid and be
certain that the bore passage remains clear. Failure to observe this
precaution can result in excessive pressure within the suppressor
body and damage to the suppressor.
4

SOUND SUPPRESSOR MODEL BLACKSIDE-40 P.
ARTIFICIAL ENVIRONMENT MATERIALS
Water: Water is the most efficient medium and provides the greatest
degree of reduction through adsorption of heat in the phase change pro-
ces. However, we discourage the use of water except in an emergency.
Products of combustion of smokeless powders contain oxides of nitrogen
which combine with water to produce nitric and nitrous acids. These acids,
intime, willerode aluminum, includingthrough thehard anodizeouter tube.
Water itself will slowly corrode aluminum. If water is used, it is important
to blow the suppresor dry with compresed air at the end of the day. Water
substitutes include bodily fluids, such as saliva.
Oils: Second only to water in efficiency, light oil lasts longer than
water (perhaps 3 magazines). Depending on the oil, there may be slight
to moderate smoke produced. The Teflon-based and synthetic oils tend to
last longest and produce the least smoke.
Greases: These are the longest lasting (generally over 3 magazines),
do not leak at all, and do not evaporate with time. The efficiency is similar
to(or minimally lessthan) oil,and grease ismost aptto smoke andsplatter.
The best greases for suppression have a low “drop point” (melting point),
such as Lubriplate F-105 and FML-2. Standard automotive chassis lubri-
cantis considerably less efficient,and of theautomotive greases, synthetic
greases are by far the best. One outstanding synthetic automotive grease
is Mobil Premium Synthetic, which may not be available in all states.
Vaseline: This is listed separately, and it may well be the best of the
greases available. Of the greases, it provides one of the better efficiencies
(moderately low drop point) with little or no smoke. Its only disadvantage
is the lack of a good delivery system (no long nozzles on the tubes, not
available in an automotive grease gun cartridge), and it must be installed
by spooning with a stick applicator.
Wire-pulling lubricant is used by a number of clients and appears to
be both popular and easy to instill.
ROUTINE CLEANING
This suppressor does not require much maintenance. Because of the
use of artificial environment technology (particularly when using grease or
oil), there is only minimal carbon deposition. Further, a small amount of
carbon remaining in the suppressor is beneficial to operation.
As a rule, Gemtech reccommends against any effort at cleaning this
suppressor other than cleaning the mounting threads and L.I.D. with a
hydrocarbon based solvent. Neglect is far less harmful than improper
5

SOUND SUPPRESSOR MODEL BLACKSIDE-40 P.
cleaning or use of improper cleaning agents. Water based cleaners will
damage aluminum.
Thereare noperfect solventsfor cleaning thesuppressor orremoving
the carbon deposited on the internal parts by the burning of the powder.
Thefactory recommendation is for using“Ed’sRed” (equalparts automatic
transmission fluid, mineral spirits, kerosene, and acetone) is among the
better solvents for suppressor cleaning. Never use solvents containing
ammonia, which can damage aluminum parts. This includes Hoppe’s,
Sweets, and “GI” bore cleaner.
Always read the warning label on any cleaner or solvent. The unit
can be allowed to soak for a convenient period of time and then simply
drained on each end. Compressed air can be used to blow the interior
dry. Remember, the suppressor likes moisture. Don’t worry about getting
the unit bone dry.
Cleaning by immersion may be performed every 2-3,000 rounds.
Becauseof molten leadsplattering from theheat generated by friction with
cast bullets, we suggest against the use of non-jacketed ammunition.
Any attempt at disassembly of the suppressor (other than the L.I.D)
will void the warranty.
Immersing or spraying the inside with a Teflon based lubricant (such
as Break Free) will decrease carbon build-up within the suppressor.
Ultrasonic cleaners are of little or no value, because they require the
use of water based solvents, many of which damage aluminum. Hydrocar-
bon based solvents do not cavitate properly, a requirement for cleaning.
SERVICING THE L.I.D. (Recoil booster)
Having moving parts, the L.I.D. will require periodic disassembly and
cleaning. Please refer to the illustration on the next page.
Do not use a water-based cleaning solvent, such as SLIP-2000,
Simple Green, MP-7 or similar materials.
1. Unscrew the rear cap (encapsulator) and set aside.
2.Remove thespring andpiston. Clean withsolvent. Itmay beneces-
sary to slightly scrape the parts ro remove caked-on carbon. It is accept-
able to use steel wool or red Scotchbrite moistened with a solvent, such
as WD-40, Ed’s Red, or similar material to clean the parts
6

SOUND SUPPRESSOR MODEL BLACKSIDE-40 P. 7
.
3. Coat the internal parts of the L.I.D. with a light coat of grease (such
as wheel bearing grease or Superlube with Teflon). This includes not only
the piston, but also the spring, inside of the encapsulator, and mating
surface of the rear of the suppressor.
4.Install allparts in the reverse orderof disassembly(refer todrawing
on previous page). Screw the encapsulator as tight as possible by hand
(with out tools).
PHYSICAL SPECIFICATIONS
Length 6.5 inch (165 mm)
Diameter 1.37 inch (32 mm)
Weight 10 ounce (285 gm)
Construction Aluminum
Finish Type III, Class 2 black anodized

SOUND SUPPRESSOR MODEL BLACKSIDE-40 P.
WARRANTY STATEMENT
Our “warranty” has been practiced since our personnel started in the
suppressor business in 1976, in a time before legalese and when a hand-
shakeand thissimplestatement sufficed:“Ifa Gemtechproductbreaks and
it’s your fault, we’ll fix it for a fair price in a timely manner. If it’s our fault,
we’ll fix it quickly at no charge.” This policy born of pride in craftsmanship
and honor has served us and our clients well for over two decades and
will continue in Gemtech’s future.
The small print follows:
The Magnuson-MossAct (Public Law 93-637) does not require any seller or manufacturer
of a consumer product to give a written warranty. It does provide that if a written warranty is
given, it must be designated at “full” or as “limited” and sets minimum standards for a “full”
warranty.
As do all major firearms manufacturers, Gemtech has elected not to provide any written
warranty, either “limited” or “full,” rather than to attempt to comply with the provisions of the
Magnuson-Moss Act and the regulations issued thereunder.
There are certain implied warranties under state law with respect to sales of consumer
goods.As the extent and interpretation of these implied warranties varies from state to state,
you should refer to your state statutes.
Gemtech certifies that all sound suppressors manufactured by them are free of defects
in materials or workmanship, and that they meet manufacturing specifications at the time of
manufacture.
It is our intent that the customer be completely satisfied with the product. Certain Gemtech
products may be classified as ordnance and/or implements of war and are sold by us with
the specific understanding that Gemtech has taken every reasonable precaution in providing
our customers with inherently safe merchandise, and that we assume no liability whatsoever
for unsafe handling by the purchaser or his agents. Gemtech assumes no responsibility
whatsoeverand we will honor no claims for damages, regardless of nature, for physicalinjury
or property damage resulting from careless and/or irresponsible handling, adjustments to
equipment, neglect or abuse.
Gemtech reserves the right to make changes at any time and without notice, in prices, to
change specification or design, to add or remove accessory materials, and to add or delete
items without incurring any obligation.
Use of ammunition that does not meet SAAMI specifications will void all warranties.
REPAIR PROCESS
While BATFE has encouraged the use of the ATF Form 3 or 5 for
return for repair, they have publicly stated on their web site that NFA
weapons (which include suppressors) may be sent directly to a licensed
manufacturer or licensed gunsmith for repair or modification without filing
the forms 3 or 5.
8

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