You need to understand somethings about materials and gun design. I have not seen your Iver Johnson and I do not know exactly what pot metal was used in it. Hipoints are rated for plus P ammo. And, they are not the equal of a high quality smith and wesson. But the materials as used in their designs result in the guns that will withstand a lot of shooting with 9mm ammo. Throwing a HiPoint very hard against a wall can break the plastic on them. They are not glocks. The barrels are seamless steel that is amply strong for the application at hand. Let us google it. Here is one thing and there are many others. There multiple zamak alloys also. Take a look at you car and see how many parts are not magnetic. Parts for geared-motor housing I have one in .45; test fired, it worked, and just have not gone back to it. Nothing wrong with it, but I prefer my 1911.