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Joined: Mar 2018
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Have a Kimber Custom II in .45 acp. Can it be converted to .38 Super with just a barrel change and mag change? Barrels are same length, but the .38 super is a sig barrel.

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I don't think so.
The breech face of the .45 is greater in dimeter and the extractor would not reach the .38 rim.


One unerring mark of the love of the truth is not entertaining any proposition with greater assurance than the proofs it is built upon will warrant. John Locke, 1690
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Maybe a 1911 in 9mm would work?????

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Ejectors are different also.

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Different slide and ejector needed

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I believe Tisas is making one with a 2 barrel set 9mm and 38 super

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As noted the answer to the question as asked is a firm no.

It's a perennial question and easy to find on the Internet. Reasons may include saving money and dealing with restrictions that make just buying another pistol difficult to impossible.

For the best general discussion of the subject I know of see The Custom Government Model Pistol by Layne Simpson. The book suggests, rightly, that going one step as .45 ACP to 10 MM is reasonable and swaps within a bore size as 9x19, .38 Super and 9x23 to which one might add 9mm Largo and 9mm Steyr and any number of lessor know cartridges can be quite easy. Notice that rim sizes as between 9x19 and .38 Super can vary a little, good smiths will do multi caliber pistols, it takes a deft touch to make a multi caliber extractor to bet your life on.

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10mm can also be converted to .38 Super. I presume a .40 would too.


'Four legs good, two legs baaaad."
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"Jimmy, some of it's magic,
Some of it's tragic,
But I had a good life all the way."
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