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If you have questions, do not use this product, and contact us for clarification.

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What ammunition should I use with my SMPX?

  • You can use almost any factory ammunition that you want that is 9mm x 19 Parabellum on down as defined by NATO standards in size, velocity, energy, and pressure, and is the correct ammunition for the firearm.
  • You can use standard velocity ammunition and still get subsonic results.

How long is the barrel?

  • We use your provided barrel, which needs to be at least 6″ long. If you are going to Form 1 your MPX as an SBR, the barrel length should be listed as 6″.

What is the effective range?

  • Your SMPX silencer gives you the same effective range of the Mp5 SD which is anywhere from 25-75 meters (up to 246ft).

Does the SMPX silencer void my firearm warranty?

  • The SMPX is a barrel modification only and should not void your factory warranty. We recommend reaching out to the firearm manufacturer for their specific warranty information.

What is my silencer warranty?

What is the “beyond” part of my silencer warranty? 

The beyond services are for the original Grunt owner with an approved Form 4 tax stamp and LE Agencies on a Form 5 but with limitations. 

  • Please view the FAQ tab below for warranty information.