The USMC is trying to get another 11,000 IAR

[medvedqc]

Aiming at the centre, consistent 2 ( sometimes 3) hits in 3rd burst at a man-size steel silhouette at 200m when I shot the IAR. This is precision automatic fire and exactly what the USMC asked for in an automatic rifle. The thing is extremely easy to shoot in burst, and compact

It has been said a few times by the people involved in the IAR program, the USMC wants an IAR because they believe volume and noise don't suppress enemies. Precision fire does. C9/Mimini puts out lots of noise and bullets, but it sucks as an IAR.

Some people may not agree with it, but that is the reason the USMC is willing to dump a LMG for an IAR. After shooting the C9/minimi at a range with a radar that actually showed where the rounds landed and practicing using the C9 as an IAR, I have not much confidence i can hit anything for sure unless it is a big vehicle unloading people or it is for covering an area. This dispersion is so big there is a good chance nothing gonna get hit at all beyond 200m even with a 3 round burst if the target is standing right there. While people will argue dispersion is good because the cone of fire is bigger and so is the beating zone, there is not enough bullet density to make it actually threatening. Couple of aimed short bursts from a HK IAR is way better than a long burst from a C9 IMHO.

find it interesting that the way i was trained in the 80s is the way they re doing it back... very interesting less noise and more accuracy i love that ...

 

[DaveMachine]

I'm curious as to what they are feeding the IAR with. Are they using standard 30 rounders or something like those quad stack Surefire 60 rounders?

 

[Gunnerlove]

Has the prohibition on using M855A1type ammo in the 416 been lifted? Marksman just means a pass, don't read to much into it.

 

[Stoner99]

Has the prohibition on using M855A1type ammo in the 416 been lifted?

It destroys M4 the same.

 

[Gunnerlove]

So M855A1 is good to go in the 416? Because there was real safety issues that lead to the prohibition. M855A1 is hard on guns, but so far has been hell on 416s.

 

[grelmar]

So M855A1 is good to go in the 416? Because there was real safety issues that lead to the prohibition. M855A1 is hard on guns, but so far has been hell on 416s.

Some (admittedly brief) googling didn't give me anything... What's the issue? Too hot? Burning out the barrels and overgassing?

 

[Gunnerlove]

Carrier velocity is to high and the trigger groups were coming apart.

 

[grelmar]

Carrier velocity is to high and the trigger groups were coming apart.

An adjustable gas system could solve that. Not a massive fix, but problematic to roll out across the entire inventory.

 

[greentips]

Norwegian had the same issue with their green ammo in their 10" gun, hence the improved trigger group in HK416 with a disconnector bridge to prevent striking by the hammer. All the current HK416s have this feature, including civilian MR.

That probably solved the issue back in 2012/2013 and OK the system in the most recent testing, that allows the USMC to go ahead with M855A1.

 

[Gunnerlove]

So Norway and the USMC lifted their prohibitions on A1 ammo?

 

[Rich LPS]

You beat me to the trigger group explanation Greentips! Bolt velocity issues pressuring the disconnector solved long ago with the 416.

Rich