Another very slow episode. The arrow thing was pretty cool though, how she kept talking for a bit. Seems plausible to me, the brain hasn't had a chance to process exactly what has happened.
You knew at some point something bad would happen with those three when they were out scavenging, but I thought it was going to be because of zombies, not because of another group. How would that group of (presumably) Negan's men know where to find those three so they could attack them? So they captured Eugene -- but he doesn't know where Darryl & co went. Just a happy coincidence that they came upon them and decided to attack?
The idea of making bullets sounds great, but beyond metal and a metal workshop, the key things you'd need would be primer, powder and fluxing material. Finding metal and used brass shouldn't be that difficult. The other thing you'd have to know is exactly how much powder to use, along with the exact dimensions of the bullets. Certainly not easy, unless you have experience doing it.
They are setting us up for the negan group meeting/showdown.