Vietnamese Range Compensating M79 Holographic Sight

Nguyen Tan Dung is a Vietnamese defense website and posted about this graduated reflex sight that the Vietnamese Military Technical Academy has come up with to be paired with the 40x46mm low-velocity M79 single shot/ stand alone grenade launcher. Although the Vietnamese post was published in the summer of 2015, the innovation displayed here is too strong to be ignored and not shared. This article mentions that components of the sight are produced and assembled in Vietnam. It looks very similar to one of Hartman’s reflex sight designs and knowing that IWI and the Vietnamese government have a very close industrial relationship, I wouldn’t put it too far out that this is the case. The article wrote that although the sight is engineered for the M79 copy currently in use by Vietnamese troops, plans are being made to adjust it to the locally produced MGL copy of the Milknor design when that comes into service.

Now, I am basing the following observations on conjecture. Without a physical lever to move the sight up and down, initially, it would look like the sight couldn’t account for the trajectory of the 40x46mm low-velocity rounds, as is evidenced by the short ocular window. However, upon closer inspection of the sight, it appears that it has a tilting stadia line inside of it, that automatically tilts with the angle of the weapon, possibly due to an internal gyroscope or similar device. This is similar to how the Hartman sight can turn on or off based on the position of the weapon. Ranges are imprinted along the vertical axis, and as a grenadier moves the launcher up or down, the stadia lines move with it, thus allowing the correct amount of angle with the launcher to be used and the grenade fired.

Bear in mind, this isn’t a range finder, nor does it automatically calculate the necessary tilt for an accurate HE solution. Once a grenadier finds out the range to his target, he then aligns the correct stadia distance in the sight to the target and fires the grenade.

It appears that this project didn’t go anywhere, or was successful because I can’t find anything past 2015 about it on the Internet, in Vietnamese or English (unless our Vietnamese readers can chime in with some research?). Which is really a shame because if correct, this technology doesn’t quite exist in this simplicity within a number of modern militaries in Europe or the United States.


Infantry Marine, based in the Midwest. Specifically interested in small arms history, development, and usage within the MENA region and Central Asia. To that end, I run Silah Report, a website dedicated to analyzing small arms history and news out of MENA and Central Asia.

Please feel free to get in touch with me about something I can add to a post, an error I’ve made, or if you just want to talk guns. I can be reached at


  • Anonymoose

    Funny that they’re still using weapons they captured from us over 40 years ago.

    • iksnilol

      git gud, son 😉

      • Anonymoose


    • Joe

      It did say copies. A little over a pound heavier than the standalone M320, but I assume it doesn’t take the longer 40mm rounds now in service in the US. I bet it doesn’t have the same price, either. This sight concept sounds like a solid improvement over the ones I used.

      • PK

        Why wouldn’t a copy of the M79 take longer 40mm cartridges? So long as they have either the LV case or are designed for it, long cartridges fit just fine… it’s the M203 that has trouble loading longer than spec rounds, it can’t open far enough. Even the police/civilian single shot launchers with a break open action work just fine with the stretched out LV and MV rounds.

      • Anonymoose

        I’m pretty sure the fancy longer rounds do fit in an M79, as they were designed for the M79 and maybe HK69 when the M320’s ancestors weren’t even around yet.

    • Major Tom

      There are still places in this world using World War II vintage stuff. Occasionally from time to time in Afghanistan we’ve been fired upon by stuff that’s positively 19th century. (Martini-Henrys for example.)

      In firearms, age really is just a number.

      • iksnilol


        • Major Tom

          Maybe for British forces. The US never used the Martini-Henry. (Our period equivalent rifle was the Springfield Trapdoor.)

          • PK


          • Major Tom

            And get shot to pieces by Spanish Mausers again? No we need the 1903!

    • CommonSense23

      I was using a M79 less than two years ago. It’s still probably the most natural shooting grenade launcher I have ever used.

    • B-Sabre

      I suspect they were using it as a test-bed. Why not, it’s cheap and available.

    • Kivaari

      It said they are domestically producing a copy.

  • shooter2009


    There, I fixed it for you.

    • autofull– kevin horning

      pary old and new design. at least we are not involved in a conflict there anymore. commies with good weapons and training scare me.