I would opine that the lack of progress is due to a 20m AMR being too much of a niche weapon, even for special forces.

For infantry platoons, a multi-purpose weapon makes far more sense, hence the USMC and Army choosing the M4 CG.

YouTube

Why the M4 Carl Gustaf is so deadly

Saab's new Carl Gustaf, the M4 or M3E1, is roughly 6.5 lbs lighter but is smarter and far more lethal than its predecessor.More Information: https://www.mari...

Lynx looks exciting but honestly many 50BMGs i shot were rather soft on recoil due to massively effective muzzle brakes so i am kinda skeptical that this is cutting the recoil much. And its also designed as short range anti material rifle with sub 1000m practical range.

https://www.youtube.com/watch?v=FDfLKpOkWVg

YouTube

GM6 Lynx Semi Auto 50 BMG Bullpup 4K UHD

12,7x99 (.50 BMG)GM6 Lynx is a revolutionary, unique new weapon combining light weight with portability, mobility and heavy fire power.FEATURESMost advance A...

I actually like the gm6 and the niche it puts itself in.

For something like a vehicle checkpoint where you may need to stop a vbied coming at you, you don't actually need more than 1k meter range as much as you need the ability to pump multiple raufoss or m8 API into something QUICKLY.

By being shorter and easier to fire quickly it does this better than other options. You can conceivably hoist this over a jersey barrier get behind it and pump rounds quickly then move if necessary.

Maybe there's something I fundamentally misunderstand here but I can appreciate the tradeoffs they're making, including the >1k meter precision sacrifice.

Put bluntly in many cases the guy nearest this gun at the time it needs to get used probably doesn't really know how to shoot past 1k effectively anyway.

I know I certainly don't have the skills necessary to do that truly well.

To a degree I think it's a weapon good for the force and enablers we have rather than the Ultimate tool for the ideal paper force that has nothing but guys trained to shoot past 1k effectively and $30,000 high end enablers like 3rd gen flir fuzed night vision and thermal optics etc that can identify and resolve a target sufficient to make it within ROE to be permissible to shoot.

I was thinking complementary to Charlie Gutsache, not instead. 
It’s a truism that there are few problems that can’t be solved with more HE, but sometimes more is too much more.

That being said, I think it’s a shame the xm109 payload rifle wasn’t further developed. 

Indeed that is the case , Lynx was always meant for use mostly in Assault rifle type distances, 1000m shots even with 50cal require accurate range finding and ballistics calculations so not something you do in a hurry. The most fascinating thing is that gun can be carried collapsed when its barely longer than an assault rifle. But so far i havent seen any adoption of the gun anywhere . would at least expect some ME customers to buy for the cool factor alone.

https://asiatimes.com/2021/09/one-shot-one-kill-sas-has-a-new-weapon/

Well, there you go!

I have some experience with the M82, and although the recoil is very mild and long when you are firing it from the typical angled rifle prone position, it certainly is not when firing it with the proper straight body-position (like a machinegun) behind the gun. You can certainly feel it.

I have never fired the M82 standing, but I have lifted it to my shoulder, and that quickly convinced me against ever trying, although the recoil would probably feel quite mild due to the lesser mass acting on the shoulder.

DavidPawley said:

I was thinking complementary to Charlie Gutsache, not instead.

I don't see how they are complementary.  The CG does the same thing as a 20mm AMR -- launch HE/frag rounds -- only better (84mm HE > 20mm HE).

Plus, the CG is far more versatile.  The AMR fires HE, but the CG has a wide variety of ammo types, including HE that can be set for air burst detonation.

And then there's the little matter that the hypothetical 20mm AMR mentioned in the NDIA presentation does not even exist...

The CG is undeniably more destructive, in a shorter and lighter package. 

I wonder how the accuracy and time of flight is at 1000-1500m? Even with the new FCS that corrects for drop, thats a hell of a ways for something firing at around 750-830fps. 

I'm curious whether they've ever tried a tripod mounted CG to improve long range accuracy. 

roguetechie said:

I actually like the gm6 and the niche it puts itself in.

What niche is that?  I'm sure that there's someone out there with a problem that would best be solved with a 23 lb. AMR that lacks the effective range of existing AMRs, but there can't be many of them.  At least in a military context, the vehicle checkpoint HIPPITY HOPPITY STAY OFF MY PROPERTY role has been served for some time by something arguably more effective:

gatnerd said:

I wonder how the accuracy and time of flight is at 1000-1500m?

HE 441D time of flight to 1000 meters = 5.1 seconds

p. A-8  ARN18072_TC 3-22x84 FINAL WEB.pdf (army.mil)

gatnerd said:

I'm curious whether they've ever tried a tripod mounted CG to improve long range accuracy.

It can be fired from a bipod, but considering the ergonomics, I don't know if a tripod is feasible.