All Happy Families Are Alike - S1-E22
Continuity mistake: When Moroni arrives to kill Falconi, the number of turns of rope around the hook holding Falconi changes. First it is just one loop from the front, then the shot changes to the back and it is two. The shot changes to the front again and now there are three loops of rope around the hook.
All Happy Families Are Alike - S1-E22
Revealing mistake: When Falcone is attacked with a bazooka, notice how none of the chickens in the cages move a single muscle with the explosion right next to them.
Answer: "The Merc" was a warehouse like store with aisles that sold mainly weapons, machetes, AK-47s, C-4, barrels of acid, etc. In s02e05, "Scarification", it was shown being raided by GCPD.
Bishop73