Textron Systems NGSW Rifle and LMG

[Lemonaid]

Agreed. Something that I haven't seen anyone mention is this.

What happens in a long drawn out firefight and that chamber gets hot enough to start melting that polymer case and cause polymer build up in the chamber walls?

Seems like this case design would require more maintenance in the feild to keep from having a kaboom due too chamber build up are a jam due to polymer build up on the chamber walls.

I am speculating that the True Velocity testing might be similar to the telescoping stuff as far as heat transfer. If I recall correctly the True Velocity stuff keeps the chamber much cooler than brass ammo. They tested full auto fire for quite a long time in one of their news articles with nary a cookoff.