Yes, you can make a 9mm out of a .45 M1911

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tex_n_cal

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Last year I picked up a used, customized Colt Commander. It has some nice worksmanship, but was made up of parts - the slide for example read Combat Commander, when it was a alloy Lightweight Commander frame, early Series 80 vintage.

Along the way I got a hankering for a 9mm 1911. Those in the Cult of the 1911 know that Colt Commanders use the same ejectors between .45 and 9mm/.38 Super models, unlike full size pistols. This fact means one can theoretically swap parts at the range - slide assembly and magazine, to switch between calibers.

The 1911 Government Model is nicely scaled to the .45 and 10mm calibers, but a little big for the 9x19, in my opinion. A LW Commander makes more sense for the Parabellum.

I found a used Combat Commander slide, a 9mm barrel, and a couple of Colt 9mm mags, and got busy. The barrel ramping was a big question, but in the end I got it running this evening.

I only had .45 recoil springs on hand for the Commander, which proved too strong. In any case, it fed ball ammo just fine, just too many FTE. I think a little more tuning and it will be fine.

Considering the slide is sloppy as hell on the frame, accuracy is pretty darn good. I wasn't expecting much out of the barrel, as I suspect it's an offbrand, but it shot quite well. No bulged or overexpanded cases. I didn't try any hot loads in it, just Win white box 115 gr ball and JHP. The group shown was shot indoors at 20 yards, from a rest.

More work is needed before this gun is anything more than a curiosity, but it shows a lot of promise.:D
 

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Interesting. I'd rather have 10 rounds of 38 Super than 10 rounds of 9mm but an interesting project.

So 9mm ball feeds up the 45 ramp? I wouldn't have expected that.
 
A successful project, CONGRATS! ;) One of my shooting buddies has started collecting 1911 slides & barrel in diff't calibers. So far he has 45 super, 357 sig, 10mm and 38 super. I keep telling him his wife would really enjoy 22lr kit, but he's not there yet I guess.
 
I am also looking to attain a 9mm commander.

How much did this whole project cost?
If I started with a stock .45 commander, what all would I have to replace?

By the way, based on what I've read over at 1911forum.com, you were lucky to get it to work so easily, especially the feed ramp thing.
 
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