The MagnetoSpeed Sporter chronograph was designed to be used on barrels from 1/2 inch up to 1 inch in diameter. In can also accommodate muzzle brakes and flash hiders up to 2.7 inches in length. Ideal for contoured rifle barrels (sporter barrels) and long-barreled revolvers.

For center-fire rifles and revolvers only, not compatible with airguns or rim-fire. (Note: Not compatible with the Large Brake Adapter or the V3 Rail Adapter.)

MagnetoSpeed Sporter features :

  • Simple, one-button cycling display (shows recent shot velocity and statistics, plug in to turn on)
  • Battery : 9-Volt (included)
  • Easy access battery compartment, no need for a screwdriver to swap batteries
  • Three sensitivity settings for fine-tuning
  • Integral, quick-attach strapping system; with metal buckle and triad thumb nut
  • Proven technology with updated sensor design
  • Integral 3.5 foot sensor cord

Kit includes:

  • Display Unit
  • Bayonet-style sensor (Bayo)
  • Thick and thin rubber V-block spacers
  • Heavy duty strap with thumb nut tightener
  • Ultra-compact storage container.

What is the difference between the V3 and Sporter Models?

The main difference is that the Sporter can fit on barrels from .5" to 1" in diameter. The V3 can fit on barrels and suppressors from .5" to 2" in diameter. Use this comparison chart to see major and minor differences.

Differences between the MagnetoSpeed V3 Chronograph and MagnetoSpeed Sporter Chronograph

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Product Questions

The accuracy of our chronographs can be expected to be between 99.5% and 99.9%.

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Yes, solids should perform about the same as standard copper-jacked rounds. If the round is made out of something that has very low electrical conductivity (like lead) you may have to make the device more sensitive by changing the bullet type setting, but most solids should work with the default settings.

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Yes, the MagnetoSpeed V3 was designed to work with larger barrels and suppressors up to 2 inches in diameter. The Sporter was designed to be used with rifles up to 1" in barrel diameter. If you require a custom lab setup for rail mounted guns please contact us for details on our custom services.

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The main difference is that the Sporter can fit on barrels from .5" to 1" in diameter. The V3 can fit on barrels and suppressors from .5" to 2" in diameter. Use this comparison chart to see major and minor differences.

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No. The Sporter was not designed for use with a suppressor.

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No. The V3 rail adapter can only be used with the V3 bayonet.

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No. The tapered spacer kit will only work with the V3 bayonet.

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Yes. All bayonets and displays are compatible with each other.

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The error 2 message you are seeing is actually a spacing and sensitivity error. The instructions that you received have been updated and are available on our website. The only major change is the error messages. Vertical distance or the space between the bullet flight path and the top of the sensor deck needs to be between .125 and .25" One of the two rubber V block pads should get your between that threshold if you barrel is between .5" and 1" in diameter. horizontal spacing (the space between the end of your rifle and the beginning of the flat portion of the sensor deck) needs to be between 1" to 1.5" If you are shooting .30cal and larger; start with a setting of REG (regular). If you are shooting .30cal down to .223, start with REG and then try HI 1. If you are shooting .223 and smaller, start with HI 1, but you will most likely need to use HI 2 for smaller calibers like .22lr. If confirming spacing and sensitivity settings doesn't work, please contact us.

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If you are getting to the 4 dashes but not getting any readings or error 2 or 5 messages (or any error with number message); then it is possible that you have the sensitivity setting not adjusted or the vertical alignment. Vertical distance or the space between the bullet flight path and the top of the sensor deck needs to be between .125" and .375". The recommended .25" is optimal. One of the two rubber V block pads should get you between that threshold if your barrel is between .5" and 1" in diameter. The horizontal spacing (the space between the end of your rifle and the beginning of the flat portion of the sensor deck) needs to be between 1" to 1.5" If you are shooting .30cal and larger; start with a setting of REG (regular). If you are shooting .30cal down to .223, start with REG and then try HI 1. If you are shooting .223 and smaller, start with HI 1, but you will most likely need to use HI 2 for smaller calibers like .22lr. A chart and additional information are on this link: Chart If confirming spacing and sensitivity settings doesn't work, please contact Email

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Please reference the QUICK START guide in your instructions. Make sure that you have the thumbnut at the very bottom of the threads before mounting the bayonet on your barrel.

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Yes. All Magnetospeed products come with a 2-year warranty for manufacturer defects. The warranty does not cover lost parts or parts damaged by negligence.

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  1. Make sure your app has access to the microphone on your device. Many people skip this step and do not give the app access to the microphone on their device and cannot get sync.
  2. Make sure the Sporter display shows PHON on the display. That means that the display sees the XFR cable.
  3. You must have shots on the display in order to get a sync. No shot means no data which means no sync.
  4. Make sure that your volume switches are all set to unmute. Externally and internal volume must all be off mute. Have your volume maxed out and then take it down two to three clicks from max and try to get a sync.
  5. Put the phone into airplane mode.
  6. Lastly, if you have a protective case on your device, make sure it is not impeding the full insertion of the Brick jack into the phone.
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