I'm more worried about age & UV damage to plastic than heat & abuse.
UVs forsure. It's crazy how quickly some materials degrade.
Aluminum handguard is easy. I have a few tubes that are seriously burly.
How's about something like the CAR-15 aluminum buttstock?
BTW, what's the most corrosion-resist/longest lasting spring option? Recoil and otherwise.
Again, not trying to be too far out. Anything else for longevity on the wastelands?
A few grip options, although the slickside by Guntec is disconnected