Technically, these are 3D attachments, but in practice, they are unique gun mantlets (customization elements) for each of the 16 Tier 11 tanks.
• Object 432U — Unstoppable
• KR-1 — Chopper
• 🇩🇪leKpz Borkenkäfer — Ghost
• 🇩🇪Leopard 120 Verbessert — Hallucination
• 🇩🇪Taschenratte — Fortress
• 🇩🇪Hirschkäfer — Final Shot
• 🇺🇸XM69 Hacker — Arrowhead
• 🇺🇸T-803 — Bully
• 🇺🇸Black Rock — Light It Up!
• 🇫🇷AS-XX 40 t — Woodpecker
• 🇫🇷AMX 67 Imbattable — Beast
• 🇬🇧FV4025 Contriver — Concussion
• 🇬🇧AT-FV230 Breaker — Centipede
• 🇨🇳BZ-79 — Thunder and Lightning
• 🇵🇱CS-67 Szakal — Knight
• 🇸🇪Strv 107-12 — Nightmare
These attachments are not included in any bundle.
All of these gun mantlets have epic rarity and a technical price of 1,300 gold.