firing, though the reduced material mass also means the barrel will heat up easily during firing.

Composite barrels

A composite barrel is a firearm barrel that has been shaved down to be thinner and an exterior sleeve slipped over and fused to it that improves rigidity (more is better), weight (less is better), and/or cooling (a greater rate of cooling and a greater heat capacity are both better). Most common forms of composite barrel are those with carbon fiber sleeves, but there

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