few generations ago many shooters could disassemble a 1911 pistol blindfolded. That was when Uncle Sam’s sidearm of choice was the 1911 platform. The 1911 has been in service with the US military since 1911, first as the 1911 during WWI then after a few modifications as the 1911A1 during WWII through Korea and Vietnam and smaller engagements to the present. Today’s 1911s are highly refined pistols purpose built for various scenarios: concealability for personal defense, target/action shooting, hunting, and LE/military tactical applications. Colt was the original manufacturer but since the 1980s other manufacturers have built 1911 style pistols and put their own proprietary spin on the design to improve reliability and accuracy. Some of those design changes involve the recoil assembly. So, as much as they may look like a 1911 as spec’d by the U.S. government, they are not and require a different method of field stripping.