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you can see from the pictures above that it is a unsupported Throated barrel. we have no way of knowing who made them

Daniel, this is a "Non Fully Supported" Barrel. A large portion of these overruns were made by a company called Swenson.

Daniel, The threaded 1911 barrel I received was manufactured by Nowlin Arms who makes barrels for custom 1911 shops. The chamber is not fully supported. If your 1911 is double stack (inprobable), bull, barrel or original ramped barrel this government model length barrel will not fit or function.

Daniel - This is not a fully supported barrel. If you are planning to do what you say, then why not just go straight to a known, quality source for high quality 1911 parts? There are several, and they produce quality, tested barrels and other parts. Go with Kart, Barsto or Nowlin, contact them directly (through their internet sites) and tell them what you plan, then get their recommendations. Those guys make their parts, and know exactly what you would need to do what you want your firearm to do. Buy once - cry once.