Slipslinger Bombardment (Combat)Source Weapon Master's Handbook pg. 13
You can sling a rain of splash weapons at your enemies.
Prerequisites: Quick Draw, Slipslinger Grenadier, Slipslinger Style, Throw Anything, Weapon Focus (sling) or weapon training (thrown) class feature, warslinger racial traitARG.
Benefit: You can use a sling to hurl alchemical splash weapons as ammunition with Slipslinger Grenadier during an attack action or a full-attack action, loading your sling with such weapons as a free action.
Special: This feat can’t be used with alchemists’ bombs.