The Colt 1911 Brastil,The Colt 1911A1 Brastil was an experiment conducted in 1932 by Springfield Arm
The Colt 1911 Brastil,The Colt 1911A1 Brastil was an experiment conducted in 1932 by Springfield Armory to produce the Colt M1911 semi automatic pistol out of a die cast alloy called “brastil”. Brastil is an alloy of copper, zinc, and silicon which has an incredibly high tensile strength and is corrosion resistant. It was also cheaper, and using a die cast process, much easier and faster to produce. Under rigorous testing the brastil pistols proved to be reliable and rugged. However, it was found that brastil tended to warp over time. 500 brastil Colt 1911 pistols were originally ordered, of which only 200 were manufactured before production was halted. Only 2 survive today, and are in the possession of the Springfield Armory Museum. -- source link
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