Will the new rifle have a selector switch?
Physics being what they are, the new round should have about 99% recoil impulse of current NATO ball ammo. The new design tricks and suppressor can alleviate this to some extent, but it will always be much closer to current 7.62 N than to 5.56
https://saami.org/technical-informat...coil-formulae/
The Vortex optic that was developed for NGSW has a laser and ballistic calculator built in. Can you imagine how heavy the new rifle and optic will be?
Here is some info on the optic:
https://www.thefirearmblog.com/blog/...trol-contract/
Also, 20rd mags because of larger bullets.
"The Army has awarded Sheltered Wings Inc. d/b/a Vortex Optics, based in Barneveld, WI, a 10-year firm fixed price, Follow-on Production Other Transaction Agreement (P-OTA) with a maximum ceiling value of $2.7 billion for production and delivery of up to 250,000 XM157 Next Generation Squad Weapons – Fire Control (NGSW-FC) systems over a 10-year period.
The NGSW-FC system is a ruggedized fire control that increases accuracy and lethality for the Close Combat Force. It integrates a number of advanced technologies, including a variable magnification optic, backup etched reticle, laser rangefinder, ballistic calculator, atmospheric sensor suite, compass, Intra-Soldier Wireless, visible and infrared aiming lasers, and a digital display overlay."
That's about $10,800 per unit... spicy ;D
IMO this sight is one of those things that looks great on paper but probably has many drawbacks in real life.
Having peeked behind the TACOM curtain a few times in my career, I can promise ya'll that the M4 and M249 are going nowhere for the next ~20-25 years and that's the bare minimum. There's simply too many of them in inventory and by Army standards they're plenty good enough at what they need to do, even for many combat units.
Infantry elements and similar will get all the fancy new toys first, and they'll augment existing systems as sort of a 'reality test' for some time before they buy a ton more. That 'reality test' could go either way with these things.
Remember the XM25? Everyone was thinking that'd go mainstream as well. While it did a lot of cool tricks, they were simply too expensive to push out to big Army so after one or two big SNAFU's things went back to 40mm.
Weight and barrel life seem to be the two biggest problems with NGSW. Those aren't really Sig's fault, as they were just building around the Army's requirement, but the XM5 seems very heavy fully kitted out compared to an M4.
I guess the Vortex saves some weight by not needing to use a traditional MFAL since it has vis/IR lasers already (a separate lightweight illuminator like the BE Meyers Kiji would still be needed). But, I can't find any weight info on the Vortex other than a claim that it is lighter than a traditional LPVO + mount + weapon mounted LRF, which isn't too inspiring regarding the weight. The XM5 looks like it weighs 8.4 pounds dry, so it's more than two pounds heavier before adding optics, lights, or lasers.
I'm also interested to see how guns hold up with a steady diet of 80K psi ammo. Unless they have some extra secret sauce barrel steel, these things seem like they'll be smooth bores in a few thousand rounds.