America’s oldest gunmaker has expanded its line of R1 M1911 pistols to include something it has never had before—double-stacks. How are the big guns from Big Green? Two examples tell the story.

The 2011 brings double-stack capacity and modular upgrades to the 1911 platform, but not every wide-body 1911 out there earns that name.

The STI 2011 is a double-stack 9mm variant of the venerable 1911 pistol—a design that is over 100 years old at this point. But why did the SOG choose the 2011 instead of another Glock?