I have the v2 King which is the same thing just without the #IMPROOF stamp and knurling. It is a big
mod, 23mm and almost overly huge. But it looks cool. It's hard to find a topper that looks right on it because of it's size. It hits great, adjustability is there. Copper contacts, and nice switch (albeit could use a magnet upgrade). Mine is from Infinite and is brass, the brass does tarnish super easy though, probably not the best quality brass used.