Can guns and Bullets really be made from aluminum?

So this has been sticking for me for a long time and I've never really thought it would be possible

I work with aluminum as a machinist, so I already know how much more malleable aluminum is, how easy it is to scratch, bend or just warp with heat. So I have a hard time believing that early aluminum alloys could survive more than a handful of shots before breaking

The firing pin would mushroom out and get shorter, springs would overstretch, the barrel would warp, the hammer would crack

Not to mention the bullet, it would be far less powerful than a standard lead one since aluminum is almost 8 times less dense.

Even in this fantasy world, aluminum as a weapon seems just too impractical.