Any extra length decreases urban usage and adds weight....*any*.
But how is that relevant to your case? A gun this large would require newly developed stabilizers, auto-loaders, maybe even counterweights cause the caliber is so friggin large...
Thanks for answering that question...it was a pro-western site so I had a feeling it wouldn't be completely truthful.
The M829 (from A1 to A4 the differences are so large they don't deserve to be labeled the same...) series has basically hit its roof. All the US can do now is either increase the length of the gun, use more propellant, or possibly start investing more in ETC technology. Still, the M829A3 & A4 won't be useless for a long time. The HEAR rounds are useless from day one, there is no need to compromise one thing in order to make a round "more flexible".
100% as everyone has known the A3 will be a minor upgrade.... New engine, less weight, improved FCS, and maybe...just maybe... An APS of some sort.
Yet they've chosen not to use the longer gun...they haven't now, they won't later. Our politicians and army officials are stubborn.