Specifically the [VBR-PDW](https://guns.fandom.com/wiki/VBR_PDW), the wiki article mentions that it can be rechambered to fire a different caliber cartridge, but wouldn’t that require replacing all of the guns internals (and externals) with 9mm compatible ones?
In: Engineering
Most guns can be disassembled by the user/owner into major components/blocks (trigger/fire control group, receiver, bolt carrier group, barrel, grip/stock, slide, etc.). Rechambering a gun for another caliber, provided the gun can handle the new caliber’s chamber pressure, involves replacing the barrel and receiver. The bolt carrier group might need to be replaced, but usually only if the new ammunition is a fundamentally different design( eg rimfire vs centerfire).
The VBR is (or was advertised to be) available in two different calibers. Is in, you can buy the 7.92mm *or* the 9mm version from the factory.
It is common to offer the same gun in multiple calibers. This is not the same as designing around a hotswap caliber conversion feature.
Latest Answers