Meanwhile, buy up AR lowers, AK recievers, AR10 lowers and lots of hicap mags.
GI mags are still dirt cheap, will be for a little while, but when magpul mags go from $15-$20 to $30-$40, the GI mags will go from $10 to $20 in a heartbeat and dollar for dollar, its less money for more mags which will last longer, just not as kewl.
If you want quality go for the lancers, the best of both worlds. Metal feed lips and polymer bodies, but they are costly buggers out of the starting gate.
Rifles which can still be available after any ban will have to look like Elmer Fudd stuff, which means variations of Keltec Su-16s, Mini-14s (ugh), and M1As.
There are people who manage to unfuck Mini-14s and come up with tolerable mags for them. In california some people in the 1990s had managed to be able to produce and install long heavy barrels for Mini-14s which put them on a par with the heavy barrel ARs when it came to outright accuracy, but the never solved that reliability problem with non-factory mags, and even with factory mags, they never seem to be 100%, just usable as highway patrol and prison guard rifles.
80% stuff will have more time, but might as well grab some 80% lowers when the prices are right, just understand they will probably be around a little while after a ban starts up.
We can also expect clandestine manufacture to start up on hicap mags after a ban, manufacturing technology, 3D printers, small workshops, they can produce stuff now which could not have been readily produced 25 years ago. That's especially the case with CNC lasers and plasma cutters.
The thing I saw in the text of the law about how they want to forbid transfer of high capacity feeding devices, that's a lockdown, but then maybe they are aware that it is going to be extremely difficult to enforce. What they are doing though is criminalizing the entire market, which means your discreet tradecraft game better be up and running if you want to handle business in that environment.
Remember guys, its up to US to make sure the gun ban won't work. No reason to tip the hand too much in the eve of their ability to react quickly with a rewrite, but we can monkeywrench it for a few years no doubt while people wake up and get their networks in place like they did in California.