At least a year until things get even close to back to normal is my guess. As for seeing 33 cent/round 223 ammo again? Who the heck knows, maybe never.
I have a Razor, great scope. Never used a PST, but from what I hear they're pretty decent. But if you can drop the extra cash on a Razor I highly recommend it.
Lately I've been carrying a Benchmade 581 Barrage and really like it. No pic of it at the moment though.
I'm also partial to my Spyderco Delica Wave though too:
Every AR I own has a Geissele of some sort in it. Best triggers I've tried, but it can get expensive putting them in your guns if you have a bunch of them!
I tried an Adams Arms piston on a 16" blackout w/ carbine gas system. Could not get it to cycle regardless of the load tried. Good luck on the SBR build
I'd check out the Weaver Tactical Grand Slam. I have one on a LR-308 and it's a decent little scope for the price.
Weaver Tactical Grand Slam Rifle Scope 3-10x 40mm 1/10 Mil Adjustments