We're aware of some confusion regarding the Stiletto mission "More Guns". Players say that they have crafted some of the B32 handguns, but they aren't getting mission credit for them.
The misunderstading is that you must have 6 of the guns in your inventory, not merely crafting them. You can craft the guns, or pay to get them in the mission window. Either method will add them to your inventory and raise the mission tally.
We hope that this clears up the matter for you.
--The Mafia Wars 2 Support Team.