(21 customer reviews)


In stock

The perfect pair:

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Military Square Protractor #21

The only known BACK-UP of the GPS when it malfunctions is your ability to use a military protractor and sighting compass.

The RM Military Square Protractor is the only protractor with a printed formula and a diagram to align map grid north to match the compass magnetic north.  Protractors without the conversion formula will provide a reading that is off the exact grid coordinate position.

The GPS will not penetrate sandstorms, rainstorms, snowstorms, smoke, structures, forest canopies, and thick cloud cover.

GPS readings are distorted during thunderstorms, electronic interferences and when bombing support is very close on enemy positions.

It can be jammed and detected when near or behind enemy lines.  Moisture is a common malfunction of the GPS.

Don’t let yourself be caught relying solely on electronics or batteries that can fail you. Always keep your land navigation skills fresh by practicing with a map, compass and military protractor.


  • 5″ X 5″ Square
  • 1:25k, 1:50k, 1:100k UTM/MGRS scales
  • GM Angle Conversion (LARS) printed on protractor
  • GTA 5-2-12 (2006)
  • MILS and Degree edge scales

Are these durable?

Yes. Flexible, but not flimsy. Perfect for long term use with accurate ticks.

What's the difference between the square and round version?

Other than the shape, they function the same.

Does this have a distance scale?

Yes. 2km at 1:25k and 4km at 1:50k


  1. William Comeau (verified owner)

    An awesome addition to my RIR notebooks and maps.

  2. Jeffrey Gilpatric (verified owner)

    A good add on to the round protractor

  3. Phillip (verified owner)

  4. Will J. (verified owner)

  5. Chad (store manager)

    Best protractors you can get! Plus, they come in round and square just in case you need to get your ninja-Nav on…around a corner.

  6. David Fedczuk (verified owner)

    It is what it is. I honestly only use these and my compass for classes, otherwise I don’t really care where I am, are going, or coming from.

  7. Richard (verified owner)

  8. Paul Perkins (verified owner)

    Happy with this so far. Seems to be a very good product. Thinner and more flexible than a Map Tools scale. I have not had a chance to use in the field yet.

  9. Anonymous (verified owner)

  10. John Nunnally (verified owner)

  11. Martin F. (verified owner)

  12. John Losch (verified owner)

  13. Peter H. (verified owner)

  14. Mark Vasquez (verified owner)

  15. Jacob Treichel (verified owner)

  16. scott margraf (verified owner)

  17. Rod Yewell (verified owner)

  18. William L. (verified owner)

    As expected, using it takes a bit of practice. Good quality.

  19. James (verified owner)

  20. Douglas (verified owner)

    My favorite protractor. I especially like the LARS diagram printed in red on the protractor itself.

  21. Ben (verified owner)

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