10mm 1911 question

[Sailormilan2]

If I want to convert my 1911 45 acp to 10mm, what parts are needed for the conversion. I know I need a barrel, and more than likely a recoil spring, as well as mags.
But, will the 45 acp slide and extractor work, or am I looking at a new slide and extractor?

[ar15barrels]

New slide, extractor and maybe a different ejector installed on the frame.

[NytWolf]

Because the 45ACP cartridge and the 10mm cartridge are so close in length, you can use the 45 magazine. But yes, you basically have to change the entire slide.

There is a subforum at the ar15armory for exactly what you're asking.
Project and Conversion 10mm at ar15armory.com

EDIT:
Actually, there is a thread for exactly what you need.
1911 45ACP to 10mm

This is the gist of it.

Zephyr One/Zero on Oct 5, 2010
There is no easy conversion from .45 ACP to 10mm Auto. First, you will need a whole new top-end for the 1911, which isn't cheap! Add the barrel, bushing, and etc. The breach-face on a .45 ACP is larger than base of 10mm, which is in essence a .40 caliber. See the problem. It would be easier to covert to Johnny Rowland's .400 Corbon round, which is essentially a necked-down .45 ACP casing. In another scenario, the .45 Super is viable with a beefed-up recoil spring installed. If you must have a 10mm, have Fusion build one from scratch, or buy a Kimber. Hope this helps.