>>64174177
The issue I take with getting into this weasel words stuff is that it's just too nuanced for it to matter. If you want to get technical, billet cannot legally be called forged because it technically isn't. It's essentially casting, just not casting the part itself, and instead casting it into either a block or a cylinder, and going from there. In either process, as long as the part is heat treated properly (notably absent in cast trunnions, for example) the gun won't grenade.

as far as these images go, >>64174119 >>64174177, because we don't see the ENTIRE process, from casting the initial lump of steel from the ingredient materials, to whatever forging may or may not have happened, to the machining step, it's entirely possible that the sharp angles could have shown up. Forgings are intentionally oversized, shown on the forgings of the bolt carriers we see in the video, and are then machined down to what we see on the gun. picrel is an Izhmash trunnion, the same manufacturer as the raw blank in >>64173937, and if you look up at the barrel pin area, it's notably sharper on the corners and flatter on every surface compared to the raw blank.