The bard in my D&D game will do finger guns when he wants to give someone Bardic Inspiration. With the new Crusader Rules coming in the updated Adeptus Mechanicus codex that's hitting the pre-order store this weekend, your tech priests can get deadly finger guns as well.
From the article:
With the Adeptus Mechanicus codex going up for pre-order this weekend, we’re taking a closer look at this unusual army in depth all week long. So far, we’ve covered the major forge worlds, the best ways to utilise newer Adeptus Mechanicus units, and their army-wide special rules. Today, we’re exploring their Crusade rules.
If you’re not using the ingenious narrative Crusade system, you’re missing out – building up your forces from green recruits to grizzled killers is unbelievably rewarding. One of our favourite things about the new codex books is the variety and flavour the Crusade rules add to each army. Even more so when they get a dazzling variety of unfathomable technology to play with. It’s time for the Adeptus Mechanicus to take their turn.