Four separate pillars; A is top and D is bottom. Front points toward the bowl where the Hammer appeared. The upgrade apparatus has different rules.
Open illustrated reference
Base Hammer pillar orientation and shooting referencemmmrkennedy; game imagery Activision and the relevant game studio · Source ↗Four pillars surrounding the Overlook bowlmmmrkennedy; game imagery Activision and the relevant game studio · Source ↗
Choose which of the four base-weapon pillars you are observing.