The USMC M16 / M4 Technical Manual – Oorah Manuals!

A Marine and his rifle makes perhaps one of the most individually lethal combinations on the planet. Marines and their rifles, even deadlier, and battalions, supported by individual and combined arms one of the most feared and revered fighting organizations on the planet.

However, all that efficiency is not just from Espirit de Corps. Much of this is owed to the fanatical attention to logistics and training that Marines receive on an ongoing basis. To ensure that training is the same fleet wide, the Marines (like many bureaucracies) create comprehensive manuals that cover the weapon in extreme detail. These manuals are the backbone of how the organization services its weapons systems at the field, armorer, and depot levels.

In this case, we have ourselves TM 05538/10012-IN, a completely boring set of numbers for the US Marine Corps Technical Manual, Organizational and Intermediate Maintenance Manual with Repair Parts List for the M16 and M4 series of weapons circa December 2008.

The manual is a wealth of information on the basic nomenclature, maintenance, and troubleshooting of the M16/M4 series of weapons. The manual covers in detail many of the common and a few not so common issues found on the weapons and their resolution at the armorer level.

For weapons nerds, this is a treasure trove of information. A copy of the manual can be found here at


TFB’s FNG. Completely irreverent of all things marketing but a passionate lover of new ideas and old ones well executed. Enjoys musing on all things firearms, shooting 3-gun, and attempting to be both tacticool AND tactical.


  • Mystick

    Nice. Thanks!

  • PK

    Now if only I could find a copy of the M249 TM.

    • Flounder

      Why? The FN semi auto ones will be very different won’t they?

      • PK

        It’s not for that, it’s for the full parts breakdown and maintenance schedule and so forth. I have a few of the top covers I’m working into other projects.

  • The_Champ

    Hyperbole much?

  • Wolfgar

    Amazing, they are still concerned with staggering the gas rings. Moronic!

  • The_Champ

    Was more referring to the author’s opening paragraph, but yes military manuals can be quite a sight to behold.

    • Jack_A_Lope

      Ohhhhh. Haha. Yeah. I see what you mean there.

  • Bill

    Marines can read?

    • flashoverride

      Have to be able to tell which flavor of crayons come in our MREs 😀