I don't know what i'm doing

Originally posted by u/AskZealousideal8814 at 2025-06-10T15:16:48Z

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Working on a polymer AK handguard prototype and could use some advice. I know high temp resistant polymer is a must (300°F+ heat resistance at least), and AK74-style heat shields are non-negotiable near the barrel. But I’m unsure about other high-heat zones and contact points.

Contact Points:

• The handguard retainer and trunnion area don’t get as hot as the barrel (usually), but should they still have shielding or metal reinforcement?
• Should I go with m70 style ferrule and some more metal reinforcement (trunnion area).
• I can potentially use bent round bar near handguard retainer (I don't know if this is necassary)

1. References:
   • Besides surplus AK74 handguards, what aftermarket designs handle heat well? (Zenitco? TDI?)
   • Any bad examples of polymer handguards melting/warping? (Trying to avoid that.)
2. Material Specifics:
   • Is standard nylon 12 sufficient, or do I need a fancier blends such as nylon 6/6?
   • How much heat shielding is actually necessary verse overkill?