Barrel steel is different that other steel and gets certified for high pressure use. Getting the steel is not the problem. The real issue is there is not enough demand for a supplier to make a go of it on a commercial basis. To make money at it you need to have dedicated tooling, personal, etc and therefore need to sell a bunch, not a few barrels. Such is the state of the modern SxS market.


Firearms imports, consignments


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