Some interesting concepts here.....
But the .50 rifle? Well, OK it may be hard to get later, and you could resell it once it was banned for a large profit. But for a GP plinking/SHTF rifle? It is a specialty weapon, and there cannot be that many places you can shoot it. Ammo is certainly not cheap! And I am not sure you can use it for more than target practise.
The M1A IS nice, but they are heavy as is the ammo and over penerative at close range. Though the Squad Scout does interest me alot! I would be tempted to get one of these, especially if I 'happened' to have a few 20 rounder's for 'way back when'.
If I was wearing your shoes(and I am not), I'd get the SU-16(cause you have some good mags for SHTF), the 5.56 goes out quite aways accurately and with the lighter frangible rounds you can do close quarters without penetration worries. It SU is reportedly an accurate, reliable firearm, light in weight and handy. Throw on a reddot and a surefire, buy more mags and ammo and you have a tool that'll do what you need done.
Might even have enough for an SKS, which makes a nice second rifle that trows a heavier, larger bullet for brush work(I'd try and find a Paratrooper with the shorter barrel, IF that is approved in Kaliforniastan).
I was pondering a move to CA for an upgrade in employment, but that might get postphoned for a bit. However, I had already given my Kali rifle some thought and would get the pair I mentioned above.
Now, while still in Vegas...I have decided to get a Bulgie SLR-95 and upgrade it to a mini-galil kinda tool.....If I move to Kali, it'll get sent to a midwest gunsafe(as will one or two 1911 .45 autos) to protect it from the hands of politicians.
Jercamp45