It seems that Master Model has raised the bar a little more with their Air Master Series. These awesome little pieces are designed and produced in Poland, and run the gambit with accessories from aircraft to ships in scales from 1/72 to 1/350. You have to visit their website to see it all, and more than likely you will be ordering something from them.
In this case I happen to be reviewing the Air Master Series of the 1/32 early Spitfire E-Wing which contains two Hispano 20mm cannons and two .50 cal machine guns in fairings. According to Master Models, these are turned brass pieces which are made to exact scale specs.