Not exactly.

[Percy opens Animus to take out one of the bullets so that Molly can see it.]

It's my design, though I can't take credit for making this one. [It had been Anna Ripley's, and now and then Percy still has some intense feelings about that.] If you have to compare it to anything, I suppose the idea is more like a canon. Just far more refined and smaller. Black powder, spark, fire a projectile.