Who is the doll between SOP-II and PP-90? After confirming every tagged character's presence, I believe that one was interpreted as USAS-12- But her hair is too short and she isn't wearing her hat.
From top to bottom-
Show
6F : G&K Arcade Game Room- Simonov, Training Drone, Type 79, JS 9, MDR, NTW-20, PKP. 5F : G&K Department store- K5, FAL, Zas M21, IDW. 4F : G&K Candy- C-MS, Python, AA-12, MP7, FNC, WA2000, Nagant Revolver. 3F : G&K Burger- MG4, SPAS-12, Banana, M4 SOPMOD II, ???, PP-90, 9A-91, Nyto (Anna?), Kalina. And a poster with Vector. 2F : G&K Gashapon / Figure- S.A.T.8., Saiga-12, M870, Thunder, M950A, Super-Shorty, HK416. And posters of NTW-20's maid outfit and Skorpion's anniversary outfit, a Dinergate and Tarantula, Dinergate/Jupiter/Super-Shorty gashapons. 1F : Springfield Cafe- AUG, G11, AN-94, AK-12, UMP9, UMP45, Agent, Springfield. B1 : G&K Bar- Welrod, Suomi, Grizzly, G36, Thompson, M16A1. B2 : Server Room- Vespid, PPSh-41, K11. And four regular Goliaths, a red Goliath, a Dinergate, two Tarantulas.