Pulling AC from selected Monster tokens

I am trying to work on a macro that will let me roll a basic attack against a selected monster token and report the roll result and the AC of the selected monster. I have found a bad way of doing it, using @{target|bar2} and manually adding the monster ac to the bar2 of its token. The issue with this is it means I would need to manually add the npc_ac attribute to bar2 for every single token. Is there a way to pull the monster's AC just by selecting them? I've seen  @{target|AC} tossed around in very old posts, but every time I try it the system cannot read it.  TypeError: Cannot read properties of undefined (reading 'AC') I am using 2024 D&D 5e character sheets. 

Derfy said: I am using 2024 D&D 5e character sheets.  There's your problem. The @{target|ac} (without capitalization) should work for both player and npc sheets with 2024 sheets (2014 npc sheets use the @{npc_ac} attribute instead), but the 2024 sheet is needlessly finicky and you can't really expect macros to just work with it. The macro bar, for instance, is still broken months after I reported it.

"The macro bar, for instance, is still broken months after I reported it." Is that why these arent working for me from macro bar or token action bar? They work just fine from the advanced tools page. /fx missile-fire @{selected|token_id} &{template:default} {{name=@{selected|character_name} is shooting a Firebolt at @{target|token_name}}}  {{Attack:=[[1d20]] vs AC @{target|bar2}}} {{Damage:=[[d8]]}} /fx glow-slime @{target|token_id} &{template:default} {{name=@{target|token_name} is healed for [[2d8+3]] by Elf McWarlock}}