Beretta CX4 Storm 4-Position Folding Steady Grip locks at horizontal, vertical, 45 degrees & 135 degrees positions. Beretta Trident Logo. Improved performance during rapid fire. Easy to fit & secure.The Bi Function Vertical Grip and the Vertical/Folding Grip allows "Fighting Stance" hold on your CX4 Storm. The Bi Function Vertical Grip has a waterproof compartment for batteries. All fits Picatinny/Weaver rails. Light-weight molded from reinforced polymer composite. No gun smithing required.