Help finding this handguard

At a carbine class yesterday, a fellow student let me shoot his tricked-out AR. I really liked the fore-end he had, but forgot to ask him who made it. it’s very slim and has a full rail on top, some rail on bottom and none on the side. Can anyone help me find this piece?

thank you.

Useless without pics.

I’m going to guess that you saw a Fortis Rev…

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