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Old December 18, 1999, 11:21 PM   #1
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Join Date: October 29, 1999
Posts: 883
I have a pre-70 series 9mm Lt. Wt Commander that is in new condition. I was hoping to sell it so I could buy a .45 Commander.As this looks like it won't happen I was wondering if I could put a slide/barrel assembily from a .45 in the 9mm frame. I think the only problem might be the ejector. Will the 9mm one work with .45's?
Also will the 70 series barrel/slide work on a 80 series Officer frame?
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Old December 18, 1999, 11:26 PM   #2
James K
Join Date: March 17, 1999
Posts: 24,160
To answer your first question, no. You would need a different ejector.

Without trying it, I think the 70 series slide will work OK on the 80 frame, but of course the 70 slide does not have the firing pin lock.

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Old December 18, 1999, 11:26 PM   #3
George Stringer
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Join Date: October 12, 1998
Location: Earlington KY
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Skeeter, you will have to replace the ejector and if you are getting a stripped slide you will need a different firing pin and extractor as well. Brownells,, sells a little spacer called the wedge I think that will allow you to use a Series 70 slide on an 80 frame. George
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Old December 19, 1999, 10:40 AM   #4
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Besides the ejector, which has already been covered, you would also need to have the feed ramp recut for the 45. Since you have the light weight aluminum frame, that may cause some metalurgical problems since you're getting past the original surface of the aluminum. George may know for sure.

What kind of problem are you having in selling this little beauty? An IDPA shooter ought to snap it up if the price is right.

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Old December 19, 1999, 08:58 PM   #5
Join Date: November 18, 1998
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Skeeter, Check your e-mail. Bill
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Old December 20, 1999, 12:50 AM   #6
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Have not shot the 9mm for 30 years and had no problems then.The widson of the years has shone that the .45 is better than the 9mm. As pre-70 series are semi-collector peices, the gun is like new and there may be no more Colts I would not sell it cheap.
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Old December 20, 1999, 05:46 PM   #7
Daniel Watters
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If you do get a new ejector for use with .45 ACP, make certain that it is specificly for the Commander Model, not the Government Model. The ejectors for the Commander, Officer's ACP, and non-.45 Government Models have a different side-to-side profile than the standard .45 Government Model ejector.

The differences between the Commander (et al) ejectors come down to over-all length and tip-angle.
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