Textron Systems NGSW Rifle and LMG

[stanc]

What’s the difference in size between the 5.56 LSAT CT and the 6.8 NGSW CT?

I have not yet seen published dimensions for the 6.8 NGSW CT round, but -- as best I can measure it (in the middle photo of post #80) -- the 6.8 CT is ~2.6" long, with ~0.5" diameter.

I would expect the 6.8 CT to have the same 0.504" diameter as the 7.62 CT cartridge. However, I have no means to measure the image with any precision, so it could be a hair smaller.

When they did the 6.5 LSAT, it looked like the cases were about the same size as the 7.62 CT cases.

The 6.5 CT case is exactly the same size as the 7.62 CT case. The 6.5 CT uses the 7.62 case, but with a different nose plug to fit the smaller caliber projectile.

If they used the 5.56 LSAT exterior profile with a .257” VLD/EPR, that would be more ideal.

The 5.56 CT case is dimensioned to take a .224" bullet. You can't stuff a .257" bullet into it. A fatter, longer bullet will require a fatter, longer case.

We know as soon as this whole thing is nailed down, the Russians and Chinese will likely have the next generation body armor developed, not that US Infantrymen are going to meet them on the field of battle on equal terms anyway.

Yeah, well, I don't see infantry combat against Russian or Chinese troops as very likely. The US has always avoided going to war against nuclear powers.

I would love a little .257” LMG that fit the profile and handling of the 5.56 LSAT. If they wanted to up the chamber pressure without reducing long-term serviceability/durability, that’s fine.

I won't be surprised if NGSW suffers the same fate as the ICSR, OICW, and other programs that preceded it. Perhaps they'll rethink the matter after testing and evaluation are completed, and decide to downsize the caliber.