The Fused Deposition Modeling (FDM) method is one of the most common techniques for producing polymer parts via 3D printing. However, its widespread adoption in critical, load-bearing applications has been constrained by the inherently low mechanical properties of standard printed polymers. To address this limitation, this study modified the printing mechanism of a commercial FDM printer to enable the simultaneous deposition of a polymer matrix and continuous glass fibers, thereby creating composite parts. The research specifically investigated the effects of two key parameters: nozzle diameter and specimen layup. The fabricated composite specimens were then subjected to quasi-static tensile testing. The results conclusively demonstrated that the integration of continuous fibers into the polymer matrix led to substantial enhancements in mechanical performance. This was evidenced by a remarkable increase in both the tensile strength and the elastic modulus of the printed parts, confirming the potential of this modified process for producing structurally robust components.