Gemtech Viper

Gemtech Viper MAC Suppressor

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Strong claim? Certainly - but Gemtech backs it up with the performance specifications of our VIPER series. It is far smaller and lighter than the original Sionics design, but it retains the classic look of the early MAC suppressors by the addition of an over-diameter heat shield, knurled for a steady grip. Not only does this make for a more controllable MAC, the heat shield also makes up the most extraordinary feature of this unit.

It doubles as a secure locking device that ratchets back into a rock-solid mount to prevent loosening or dangerous unscrewing during hard use. Initial installation is simple, and subsequent mounting/dismounting is simpler yet - just slide the heat shield forward to disengage the locking mechanism to remove the VIPER from the host firearm.

It is the quietest dedicated suppressor available for one of the most widespread submachine guns ever marketed in the United States. Period. VIPER suppressors are available in .380, 9mm, and .45ACP versions.


  • Caliber: 380/9mm/.45
  • Sound Reduction: 32 dB/30 dB/ 28 dB
  • Full Auto Rated
  • Length: 8.7"/ 9"/ 9.3"
  • Diameter: 1.7, 1.2" / 1.8, 1.4"/ 1.9, 1.5"
  • Weight: 11 oz./ 12 oz./ 12 oz.
  • Material: 7075 Aluminum
  • Finish: Matte Black Cerakote with Reduced Visual-IR Signature
  • Mount: Fail-Safe Lock on Original MAC SMG Barrel
FFL Restrictions

FFL/SOT Requirements This item can only be shipped to a Licensed Federal Firearms/Special Occupational Tax Dealer.  Please our firearms shipping policy 

Export Restrictions

Government Export Restriction This item may be regulated for export by the U.S. Department of State or the US Department of Commerce. Please see our Export Policy.

ITAR Restrictions

ITAR Product By adding to cart, I understand, acknowledge, and agree to the Export Policy. I am a US Person, and I do not intend to export this product.  Please see our Export Policy


Additional Info

Additional Info

Manufacturer Gemtech
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