Tac, I have four of these KGP69, and would rather think of them as all steel, but actually I believe the frame is alloy, maybe a denser alloy of aluminum, and painted. The gun is just as heavy or heavier than the La/Ep22 size Erma, but it has more parts, a true hold-open, and a magazine safety that works.
One of my KGP69 guns has some edge wear and a slightly peened area on the frame, that show thru to the metal and I really don't think it is steel.
I will try the magnet test tonight, and re-post or edit to confirm.
If alloy, it still must be denser, have a better mix, or be thicker. One thing, is I believe the larger Erma's have an aluminum barrel and steel bore-sleeve, IIRC. The KGP69 barrel is all steel, I'm sure.
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