So it's been 4 hours since the tweet but I didn't see any post here yet showing that BSG confirmed working on the PSA KS-47 (also, TIL PSA is not allowed in titles).
So, following .300 Memeout, BSG adds once again a complete meme rifle never intended for any actual combat. I starting to wonder about their goals and priorities in the content department.
EDIT: Since reddit doesn't seem to like adding images I'll just include the Twitter link.
EDIT2: Turns out this is actually the CMMG Mutant. Holy shit these rifles are similar, I only knew the KS-47 by memory but you can see the differences if you know what to look for. Ultimately the same end result by a different name I suppose.
Source: https://www.reddit.com/r/EscapefromTarkov/comments/lujt6n/palmetto_state_armory_ks47/