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There are numerous replacement parts with blueprint numbers beginning "779". About anything big enough to stamp a seven digit number on, to include barrels, slides (standard and match) and match bushings. Some of them will also have another cryptic number that is the CAGE code. You can use it to track down the actual manufacturer. There were companies I had never heard of making barrels and slides, in addition to Colt, Drake, and S&W. Yes, S&W had a contract for replacement 1911 barrels.
The government was procuring 1911 parts up into the 1980s even as the Berettas were coming in.
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