The Firearm Blog

The Norwegians finally seem happy with their new H&K 416 rifles. They have solved the problem of soldiers getting sick from inhaling the fumes of their “green” 5.56mm ammunition by simply not shooing at their indoor ranges.

Of course it is summer in Norway right now and I wonder how much fun the HK 416 troops will be having when thier fellow H&K G3 equipped buddies are using the indoor range!

From the Norwegian Military website (translated by google)

Gisle Mjaatvedt is in the HV-16’s Battle Claymore and has shot up to 5000 shots with the new rifle to the military. He has never felt that he himself or any of his colleagues in the Home Guard have been sick as a result of that they have shot with the lead-free ammunition that has been as much about skriverier. – No, the health problems that have arisen because of the gunpowder gas has we have been free of, “says Mjaatvedt.

The report that has analyzed the issues around health as a result of firing states in part: “Based on the reported symptoms and the composition of the gunpowder gases from HK416 is likely that the cause of health problems are high concentrations of copper and zinc in the exhaust fumes.” Summary is that as long as it is shot outdoors with the HK 416 and its ammunition will exhaust concentration is so low that it does not give health problems. To Mjaatvedt and colleagues have done all the time.

Thanks to Daniel Watters for the link.

Two months ago I blogged that the Norwegian Army suspected that the ammunition used in their new H&K 416 rifles were making soldiers sicks. Chief of Staff Brig. General Rune Jakobsen initiated an investigation after Army HQ received three different reports about groups of soldiers getting sick after firing the new rifles. Symptoms included headaches, fever and joint pain. The investigation has determined that the soldiers were experiencing mild heavy metal poisoning caused by the “green” lead-free 5.56mm NATO ammunition manufactured by Nammo.

Norwegian solider with H&K 416

The report states that the gas exhausted from the rifles contained high levels of copper and zinc which account for all the symptoms suffered by the riflemen. A few, quite comical, short term solutions have been recommended. These include only shooting outside, slower rate of fire and spacing the shooters out more when at the range!

In 2003, under pressure from environmental groups and politicians the Army started using environmentally friendly ammunition. Since then they have had plenty of problems. The Norwegian ISAF (International Security Assistance Force) troops in Afghanistan were ordered to use the new ammo. The ammunition delivered either failed to fire or did not have enough energy to cycle the weapons. 300,000 rounds had to be dumped leaving the troops with no reserve ammunition. All the troops who did not need to leave the base had to hand in their ammunition so it could be distributed to those who needed it. The Army has also had to ban the green ammo from use in the MG3 machine guns because unspecified malfunctions occurred that could harmed the operators.

Nammo 5.56mm ammunition

I found a powerpoint presentation on the internet made by Nammo in 2006 extolling the virtues of their green ammunition. Here are a few very ironic slides (I added the red arrows):

Recently it was determined that the “green” tungsten training ammunition used by the US Military could be toxic.

So in summery: don’t use green ammunition.
Many thanks to Daniel Watters of The Gun Zone for the research he did for this blog post.

In my recent article about the Norwegian H416 rifle, Mauken, a Norwegian soldier, posted a link to this article at aftenposten.no (I have translated it into english using google):

Soldiers may have been sick of the military’s new rifle

Army turns the alarm after a number of officers and soldiers have health problems after the shooting with the military’s new standard rifle, “HK 416″.

Gun are heirs to AG3, and is about to be phased in for all Armed Forces branches. Some departments, including the Norwegian soldiers in Afghanistan, has had the gun in about a year, writes Dagbladet.no.

Hærstaben have been in three different concern from messages incidents where about 40 skyttere have experienced various health problems. It has been reported that strong discomfort in the chest, neck and munnhule after the shooting, unpleasant cough for several hours after the shooting, nausea, fever, headache, joint and cold svetting after the shooting.

Chief of Staff in hærstaben, Brigadier Rune Jakobsen, have now initiated full investigation to find out what it evokes the most serious problems. It has already been initiated medical examinations of the involved personnel.

One of the main theories in the military is now working on the basis that it is the gunpowder gas from the ammo, and not the weapon, which causes problems. HK 416 uses a smaller caliber, and thus a different type than the old munitions AG3.

Norway has been using the H&K G3 which is chambered in 7.62×51mm NATO. The HK416 that is being adopted is an AR-15 derivative and chambered in 5.56×45mm NATO.

H&K G3 rifle. Photo from Wikipedia.

It is not uncommon for an ammunition producing country to develop a new powder specifically optimized for the a new cartridge / rifle combination when it is adopted by the nations’ armed forces. It is possible that this powder used in the Norwegian 5.56mm ammunition is toxic. Maybe the lubricant they are using reacts badly with the gas from the powder? Maybe plastic parts are melting and releasing a toxic vapor? It will be interesting to see how this story develops.

Thanks to Mauken for the link.

Tanfo, a Norwegian soldier, reports at the ar15.com forum that they have been having problems with their new HK416 rifles.

Norwegian configured HK416 with suppressor.

One of the problems is that the piston system locks up if the gun is taken outdoors from a warm building when the humidity in the air freezes in the Norwegian arctic conditions. The C8 (Colt Canada full-auto AR-15) that is used by the Norwegian special forces also has this problem but can be fixed in a much more timely manner than the HK416.

Apparently the gas regulator, which that controls the amount of gas flowing into the gas piston system, often switches modes during firing. The gun will not function properly if set to the suppressor mode if a suppressor is not being used.

HK416 Gas regulator

I imagine the Norwegian will have these problems sorted out in the next few years. It does seem odd that they did not identify the problems before purchasing the rifles.

Many thanks to Jay for the link.