We've seen that handguard already. It's quite old by now but that's not the calendar handguard he's talking about unless Saru got the handguard mixed up.Immediately there is a reply underneath that shared the picture of the new handguard:
View attachment 106621
View attachment 106623
Here's a bigger image of the above one taken from this forum.
The calendar handguard Saru was talking about should be this one instead.