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GMT-300 BLACKOUT

 ©2014 GEMTECH

®

.  GEMTECH and G-CORE are registered trademarks of Gemini Technologies, Inc. All rights reserved.

AMMUNITION: 

We encourage the use of Gemtech 300 BLK ammunition.

(Visit: 

gem-tech.com for more information)

  

       

ONLY USE .300 BLACKOUT AMMUNITION 

MEETING SAAMI SPECIFICATIONS WITH THIS 

GEMTECH SUPPRESSOR.

SAFETY WARNINGS:

Make sure suppressor is TIGHT to the shoulder of the barrel for 

proper alignment. Silencers are potentially dangerous. Safe and 

proper use is the responsibility of the product user. Gemtech is 

not responsible for improper use of this product. 

INSTALLATION AND REMOVAL:

      

WARNING! DO NOT INSTALL OR REMOVE THE 

GMT-300 BLK WHILE THE FIREARM IS LOADED.

First remove the magazine from the firearm. Second, visually and 

manually check and clear the chamber and action. Make certain

the firearm is unloaded at all times.

INSTALLATION: Remove any thread protector or muzzle device. 

Thread the suppressor clockwise onto the muzzle.  

HAND TIGHTEN ONLY. DO NOT OVER TIGHTEN.

REMOVAL: Unscrew the suppressor by hand. If necessary use a

3

/

8

 inch socket wrench inserted into the muzzle to loosen.

CAUTION! DO NOT REMOVE THE GMT-300 BLK 

WHILE THE SUPPRESSOR IS HOT.

SPECIFICATIONS:

• SOUND REDUCTION: 36-39 dB
• CALIBER: 300 BLACKOUT 
  SUPERSONIC AND SUBSONIC ONLY 
• FULL AUTO RATED*
• LENGTH: 6.7”
• DIAMETER: 1.5”
• WEIGHT: 14 OZ
• MATERIAL: TITANIUM
• TUBE FINISH: DESERT TAN CERAKOTE
  WITH REDUCED VISUAL-IR SIGNATURE 
• CORE FINISH: TITANIUM
• MOUNT: 

5

/

8

-24 THREAD

*Fully automatic fire is defined as 4-8 round bursts, every 3 to 6 seconds.

GEMTECH

® 

ALL RIGHTS RESERVED. For more information visit 

www.gem-tech.com for accessories, adapters, and ammunition.  Manufactured by:

 

GEMTECH, PO Box 140618, Boise, ID 83714. Phone: (208) 939-7222. [email protected]

WARRANTY REPAIRS:

RETURN OF DAMAGED 

SUPPRESSORS:

If a suppressor is damaged due to a manufacturing 
defect once it has been fired, it may be returned to 
Gemtech 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 damage is due to 
manufacturer defect. It is the responsibility of the 
customer to cover shipping costs and insurance to 
return the suppressor to Gemtech for inspection or 
repair. Gemtech will pay any reasonable shipping and 
insurance costs to return the unit to you. To ensure 
proper legal procedures for any repair returns, fill out 
and provide a copy of the 

General Service Form with 

any packages sent to us

(Visit: gem-tech.com, 

navigate to CUSTOMER SUPPORT/RETURN & REPAIR 
POLICIES to down load the 

General Service Form.pdf 

or call 208.939.7222).  
 

BATFE no longer requires transfer on a Form 5 to the 

manufacturer for repair. BATFE does require a letter 
accompanying the suppressor detailing the repairs or 
modifications required. BATFE 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 tube in the case of damage to the tube. 
Tube damage rendering the suppressor unsafe to use 
will require a new suppressor.

WARRANTY AND DISCLAIMER:

READ AND FOLLOW ALL PRODUCT INSTRUCTIONS 
AND WARNINGS. 

LIMITED WARRANTY: 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 time of manufacture. This warranty 
is limited to the repair or replacement of the product. 
This express limited warranty is exclusive and no other 
express or implied warranty is otherwise provided. 
GEMTECH MAKES NO WARRANTY OF MERCHANTABILITY 
OR FITNESS FOR PARTICULAR PURPOSE. 
Product technical 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.

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.  

       

BEFORE USING THIS SUPPRESSOR:

BE CERTAIN YOU HAVE READ AND UNDERSTAND THIS MANUAL. FAILURE TO 

FOLLOW INSTRUCTIONS IN THIS MANUAL CAN RESULT IN THE POTENTIAL 

FOR SERIOUS INJURY AND PROPERTY DAMAGE. USE EXTREME CARE AND 

CAUTION WHEN HANDLING ANY FIREARM AND SUPPRESSOR. 

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