The Ryobi Caulking Gun Conversion Kit converts the standard Ryobi caulking gun to use on 10 oz tubes and eliminates buckling.

Fits these Ryobi Tools –
P310
P310G

The kit includes an adapter plug, aluminum tube, and front ring cap to convert a standard Ryobi caulking gun.
(Ryobi Caulking Gun Not Included, only the tube, adapter, and ring cap)