Available from Custom-Scale are 1/35 scale turned aluminum barrels + muzzle breaks for various WWII-era German guns.
This is partial text from the full article (usually with photos) at https://armorama.com/news/custom-scale-metal-barrel-upgrades
This is partial text from the full article (usually with photos) at https://armorama.com/news/custom-scale-metal-barrel-upgrades