Magnum Research BE99153RL Baby Eagle III 9mm Luger 4.43" 16+1 Black Black Carbon Steel Black Polymer Grip. The Baby Eagle 3 is a 9mm caliber double/single action pistol. This handgun features a 4.43 inch barrel along with a polymer frame and a carbon steel slide finished with a black oxide coating. It also features a combat type 3-dot sight set up and two 16 round magazines.