Concrete is a widely used construction material renowned for its durability, workability, resistance, and cost-effectiveness. However, due to the increasing incidence of terrorist attacks and industrial accidents, there is a growing need to enhance concrete’s resistance to blast and ballistic impacts. This improvement is particularly important because concrete’s low tensile strength, compared to its compressive strength, makes it vulnerable under such extreme conditions. One method of improving the characteristics of concrete is by incorporating fibers into the mixture. Natural fibers are gaining interest in recent years due to the increasing demand for eco-friendly materials. In the current work, Alfa fibers were chosen. Eight different formulations with Alfa fiber content ranging from 0 to 100 kg/m3 were tested to assess the concrete’s properties. The measured mechanical properties showed that the inclusion of fibers slightly reduces compressive strength compared to ordinary concrete. However, flexural strength increased, with an optimal fiber content of 15 kg/m3. Ballistic resistance to bullet impacts was determined by measuring penetration depth, crater area, and the lost mass of the ejected fragment. The Alfa-reinforced concrete exhibited lower penetration depth, smaller crater area, and reduced lost mass compared to the reference concrete, with optimal values achieved with 15 kg/m3 of fibers. Moreover, the blast resistance of the proposed concrete was investigated. Experimental observations demonstrated that the inclusion of Alfa fibers enhanced the concrete’s response. The fibers were crucial for maintaining slab integrity by limiting crack propagation. The results support the use of Alfa fibers for reinforcing concrete in both civilian and military construction projects.