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  #1  
Old 02-13-2020, 06:21 AM
1911Pistolero 1911Pistolero is offline
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9mm Slide on .45 Frame

Is it possible to put a 9MM slide on a .45 frame without major modifications?

Sorry in advance if this was asked previously, but I couldn't find anything on the topic when I searched for it.
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Old 02-13-2020, 07:05 AM
Sailormilan2 Sailormilan2 is offline
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Absolutely. There should be no "modification" necessary. Though, you might have to change the ejector, since there is a difference in style and sizing between a 45 acp Govt ejector and a 9mm ejector.
Okay, now having said that. One might run into a minor problem with the slide going on the frame, mainly due to tolerance stacking. However, slide and frames from the same manufacturer should be good to go. My 9mm Rock Island slides fit just fine on my Rock 45 frame, and a Para Ordnance slide fits just fine on a Springfield frame. But, one of my 9mm Rock slides does not go on my Springfield frame.
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Old 02-13-2020, 07:36 AM
yeti yeti is offline
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It is all a compromise.
Buy a standard (unramped) barrel, but the feed ramp angles differ slightly for 45 & 9mm. Compromise.
Some (me included) strongly prefer ramped barrels for 9mm 1911's.
Likely need an extended ejector in the middle ground that works well with both slude setups. Another compromise.

Consider getting a nice used complete 9mm 1911 to freshen up.
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  #4  
Old 02-13-2020, 08:35 AM
1911Pistolero 1911Pistolero is offline
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Thanks guys.
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Old 02-14-2020, 12:06 PM
Rock185 Rock185 is offline
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1911pistolero, What yeti said. If not using ramped barrels, the difference in the frame ramp angles between 9MM and .45 is significant. That difference in angle is not a good thing in getting 9MM to feed reliably on a .45 frame. Been there, done that with non-ramped barrels. My 9MM 1911s of the last several years have utilized ramped barrels. Boring reliability, headaches gone
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Old 02-15-2020, 11:53 PM
1MoreFord 1MoreFord is offline
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I've had the feed ramp angle problem the other way. .45's don't feed well across a 9mm/.38Super feed ramp either.

If you want multi-diameter rounds go with a ramped barrel.
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