Abstract: An extensible aerodynamic stabilizer and retarder apparatus for use on the ail section of free fall weapons. The apparatus replaces the conventional tail fins previously used to stabilize such weapons. The disclosed apparatus is capable of collapsing to a diameter no larger than that of the diameter of the weapon itself. A weapon embodying the present invention can be usable in either of two retarding modes at the option of the aircraft pilot. The stabilizer and retarder comprises a plurality of pivotally attached fin members positioned symmetrically about the aft end of the bomb and connected together at their free ends by a strong flexible material. The attached fin members form a cylindrical area or chamber within which a flexible inflatable conical shaped bag is stored for deployment where a high drag mode of operation for the weapon is required.