Way undersized - Vector Optics Snap Caps w/ Sling

These seem nicely made, but are way undersize... a tiny bit narrow (which isn't so bad), but the distance from the base to the shoulder is at least 1mm shorter than a real round, so it sits too far down in the chamber for the extractor to reach it (this is the .223/5.56 version). This makes them useless for testing... I'm not even sure the firing pin touches the silicone "primer" when dry firing. Not worth the effort to return them for $8, I'll just use them for key fobs. Conveniently for that purpose, they are already cross-drilled near the base.