In some cases, just a barrel change. My GI is a 38 Super/9mm, it uses the same bushing. I’ve heard people argue the differences in ejector lengths as well. I’ve mainly shot 38 Super.

Font forget about magazines as well

 

@Dwe

 

You might need to change the recoil spring weight as well. I'm still sorting my barrel conversion out but spring weight could be one of my issues: https://www.1911addicts.com/threads/is-this-a-mag-issue-or-a-weapon-issue.52031/

I'm looking at and seriously thinking about having a dedicated 9mm slide assembly so it's a straight swap and shoot instead of swapping barrels and recoil springs. Keeping the parts in one tidy package just makes it easier for me.

 

Going from 38 Superb to 9mm is a piece of cake.
Barrel, possible the bushing, recoil spring and probably the extractor.
The 9mm barrel/bushing will have to be fitted of course.
You can use a 38 super mag, however you should buy 9mm mags.
A good gunsmith can tune the extractor to run with both barrels however a dedicated 9mm extractor should be fit because the 38 Super is a simi rimmed case where as the 9mm is rimless.

See... like I said piece of cake!

And yes, having a complete top end in 9mm would be Ideal...
Not cheap, but preferably.

 

My CCO in 9/super 38 runs perfectly with a short ejector. Nines will mostly run in a super
magazine. Metal form makes an officer length nine and super 38 magazine.

 

Forgot about recoil spring weight.
As far as magazines, I would use 38 Super mags for range use, but I wouldn’t carry it without a 9mm mag installed

 

Thanks guys

Guess I will research slide options as well, see what a Caspian or other slide and full upper build will set me back and then weigh the options


Sent from my iPhone using Tapatalk Pro

 

@simonp why not ask the gunsmith your thinking about using? You'll hear different aswners from everyone. The gunsmith is the one that's making it happen.

I have a a 38super/9mm that i only change the recoil spring. It uses the same extractor and same bushing.

 

I have a Colt .38 Super that also has 9mm and 9x23W barrels fit to it. Each barrel has it's own bushing and I use different recoil springs for each caliber. The ejector and extractor have been tweaked so that all three calibers cycle reliably. I prefer to use 9mm mags with 9mm, while Super and 9x23 use the same mags.