skyscraper destroy bf4, battlefield 4 To take down each pillar you will have to: Shoot 2 RPG rockets Shoot 5 M320 grenades Place 5 C4 packs Shoot 17 XM25 Airburst grenades Shoot 2 shells from the Main Battle Tank Shoot 14 rounds from the LAV main gun Watch below video to watch exactly how it’s done.