It could be a question of which manufacturer.

I bought a Black coated engraved Purge B2B that I thought was brass. When I received it I found the tube was black painted steel although the button housing was brass. Although it performed really well the weight of the thing (also with a 21700 and RDA added was close to 400gm) which meant the engravings feel sharp in the hand.

Regular SS Slam Piece clones are available, but When I was shopping for a Slam Piece I studied the pics very carefully and noted the gunmetal version was also steel. I played safe and went for plain brass as there are coated steel versions in the range.

I wouldn't risk it - asking before buying is the safest route. The sad thing is the steel Purge B2B I bought has pretty good performance, but the combination of weight and sharp edges of the engravings makes it a bit much for my wimpy hands. The Slam Piece is a little lighter than the B2B, but not much so if you like steel I recommend choosing a smooth finish and avoid the engraved versions - only consider knurled steel if you are a masochist lol.

There is a 28mm version of the Bestia that takes 21700. If you look at Alisomething, put mech mod 21700 in the search a couple show up.

You're right,

My concern about the weight isn't so much about steel being heavier - its more about the sharp edges, taking any pointy bits from brass can be done with a little work it isn't so easy with steel. And the combination of heavy and sharp is too much for my wimpy hands lol

Looking at the Bestia twice in one day - now I want one. Dammit