You know it was effective because I still remember it and the tagline is a pop culture icon. Parts is parts! This was part of the great Burger Wars of the 80s back before burger companies could troll each other on Twitter. It doesn't match "Where's The Beef?" but still pretty good.
Anyway, speaking of parts. The sudden supply glut of guns and ammo has also been accompanied by more and more parts being available and that means it is time to stock up. I just picked up a couple of nickel boron bolt carrier groups, just as spares, for less than you can buy a regular nitride or phosphate BCG for thanks to being a dealer. This is the first time in over a year that I have seen these available.
The point being that a lot of parts are back in stock for now. That means you should take stock of what you have and what you need, both on the gun and in your back-up stash. You can't overestimate the difference upgrading the parts on your weapon can have. Parts is not just parts.
This situation won't last long.