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https://www.proofresearch.com/the-products/barrels/savage-pre-fit-barrel/ Cost ~ 1K$

Used to work with a guy making model (large) parts with carbon fiber.  I was surprised by the low resonance (stiffness) of his parts.  IMHO, barrels need to be covered with abrasion resistance coating.  Nicks in the fiber weaken it.  Heat is also a big problem, for the resin.  My plastic coated pellet rifle barrel bends easily.

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