Springfield Armory Ronin Pistol, 9mm Luger, 4 inch Barrel

The Springfield Armory 1911 Ronin EMP (Enhanced Micro Pistol) chambered in 9mm Luger with a 4-inch barrel is a premium, single-action semi-automatic handgun optimized specifically for concealed carry. While standard 1911 lines utilize a 4.25-inch "Commander" barrel length, the 4-inch variant defines the scaled-down, patented EMP architecture. Rather than just shortening a standard .45 ACP frame, Springfield Armory re-engineered the entire 1911 action around the shorter overall length of the 9mm cartridge, resulting in a thinner, lighter, and more reliable compact defensive weapon.