Cities of Sundara: Silkgift (PFRPG) introduced aether weapons, firearms that use compressed air tanks to propel their shots, rather than gunpowder.

Aether Grapnel (Two-Handed Firearm)

In some ways a hybrid of Silkgift’s aether weapons and net casters, the aether grapnel has a design not dissimilar to that of an aether rifle, but instead of a harmful projectile being fired by the rifle, it launches a grapnel instead. A grapnel weighs significantly more than the normal ball ammunition fired from a standard aether rifle, and the integral aether reservoir can only launch one grapnel before being depleted. The grapnel will trail rope behind it once fired, and Archer silk is commonly used to make the rope, due to it being light and strong.

Reloading a new grapnel into an aether grapnel takes a full-round action. All other rules that apply to standard aether weapons as found in the Silkgift book should be used for replacing and refilling the reservoir, misfires and firing underwater.

Though not a weapon, an aether grapnel still fires a hard object with force and it can still do damage. The cost includes one grapnel and 100′ of rope. Unlike normal aether rifles, aether grapnels do not come in dragon steel variants, as the improved material does not provide a noticeable benefit.

Cost: 800 gp; Damage: 1d4 (Med)/1d2 (Small); Critical: x2; Range: 50 feet; Misfire: 1;
Capacity: 1; Weight: 12 pounds; Type: B