It’s a ‘work in progress’ for anything beyond Div at this point — I think there is a consensus that Corps don’t need to be (or shouldn’t be) cookie cutter - which means that some Div’s probably won’t be either.
Plus unless we adopt a lot more robust Corps Arty structure than planned currently there will be a lot of extra Rocket Bn’s.
One of the problems with Force 2030 is that there hasn't been much new about it in the open source literature since around last October. My assumption is that corps arty remains a tailor made mix of current independent Fires Brigades made up of a headquarters, a Brigade Support Battalion, a signals company and UAV and STA batteries and of a mix of MLRS, HIMARS and M109 battalions. There are five Active Army Fires Bdes one assigned to each of the five Corps and another eight of which are unallocated ARNG brigades in a general pool. I haven't seen any change announced for any of those.
My guess is the 777 will go to M119A3 units in Light roles. There doesn’t seem to be a lot of interest in 105mm down here anymore.
IBCTs currently have battalions mixed with two M119A3 batteries and one M777 battery. I'm not sure there are enough M777s left in the inventory to upgrade the M119A3 batteries. There are some 34 IBCTs in the Army (Active and ARNG) which would mean some 408 M777s would be needed to upgrade all the M119A3 batteries to M777. The Army has some 821 M119s and 420 - 518 M777s (the sources vary) of which 204 are in IBCTs and 162 in the 9 SBCTs (which makes me think that the lower figure might be more accurate). (Not counting what has been transferred to Ukraine or how many of the 580 owned by the marines were made redundant.)
Right now I suspect those Stryker Bde’s as the 3rd Maneuver element in a Heavy Div will lose the 777’s over to Light/Abn Div’s and the Div will get A7’s. Those SB’s in Light Div’s would retain the 777 I would assume.
The Army 2030 plan called for a single wheeled SP 155 Bn for Heavy Div but like I said, its anyone's guess with the restructure. To me the most logical thing would be to give them A7s so that all three battalions in the Heavy Div are the same gear. I can no longer see any advantage to a wheeled SP in a Heavy Div construct. It's an unnecessary complication and the cost savings would be minimal for acquisition and probably negative for sustainment.
A few Stryker Bde’s got moved in Light Div’s as a protected mobility maneuver element.
Which sparked a debate along with the MPFV Light Tank as to what doctrinal justification exists given our current plans for Light/IBCT units
It would be a mutt thing at best. I can see SBCTs in heavy divisions to give them more dismounts for a variety of tactical needs. I don't see the same purpose for the Light divisions. IMHO, if SVCTs are being added to some Light Divs, I would leave them with the M777 and standardize the Div arty on M777s and keep from introducing a new limited line of guns. Hell if they think an SP is necessary than use A7s. They aren't much heavier than most of the wheeled SPs. Yeah, Yeah, I know - road moves.
I’m not sold on the ERCA, I don’t see then need given what HIMARS and MLRS have for range/payload options.
I don’t think the barrel life will be 1/3rd of the A7, and while I’d love to be proven wrong, I’m not holding my breath.
That's kind of where I am. I didn't give much thought to barrel life until I started seeing the stats on current 155 barrel life. It's not 2,500 rounds but 2,500 EFCs, but when you start talking about "extended range" then EFCs become almost 1:1 to rounds fired and I'm pretty sure an ERCA is going to see less EFCs per barrel than 2,500. Don't know. Haven't seen the literature but physics is physics.
I don't like the per round cost of HIMARS/MLRS. I think there needs to be an additional lighter, cheaper long range precision rocket option fired from a multiple launch system. Something like the HERO 120 that the USMC are playing with - but perhaps with a choice of a rocket engine and designator guidance but basically something cheap for unitary hard targets. Something as hard to intercept as an artillery round but not requiring a gun to launch.