Sunday, 15 August 2010 06:24

1911 10mm to 40S&W conversion: New 40S&W barrel for my Colt Delta Elite 10mm

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I get asked this a lot.

Yes, you can add a 40 barrel to your 10mm pistol and it is pretty easy.
Here are some pics of what I did to add one to my Colt Delta Elite.

First, find a barrel. This is pretty easy depending on your pistol. Here are a couple of sources:
1911 5" - Numrich (Kahr)
1911 4.25" - Brownells (Storm Lake)
Glock - Lone Wolf Dist.
Tanfoglio - EAA

I bought one from Numrich for about $80. It is a very nice 416 stainless barrel. The crown is actually nicer than the stock barrel:

A 1911 is old school (i.e. not modular) so it requiries fitting. It should be minimal and any gunsmith will be able to do it. Other platforms probably will not.

I was going to buy the Wilson video, watch it and fit it myself. However, I sat on the barrel for about 3 months before I decided to just take it to my local smith and have it fit. It took him a few days and cost me less than $50.

Here is what it looks like:

What about mags and springs?
Good questions.

I put it in a 20# Wolff with a standard guide plug that I already had.
I also used the stock 10mm magazines and it has worked perfectly with several brands of ammunition.

If I was to rely on it for self-defense --not sure why I would underload a 10mm--but I would get a couple of 40S&W 1911 magazines with the spacers. The OAL differences of the two cartridges is pretty great so I would be worried about potential feeding problems. Since this is just to use cheap(er) range ammo, it is not an issue for me.

Pretty neat setup for minimal cost.

Last modified on Wednesday, 17 February 2016 21:27


# Marren 2010-09-20 07:30
Thanks very much for writing a lot of this excellent information! I am looking forward to reading more!
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# reg 2010-09-21 14:31
Thanks! I am looking forward to running its paces with the MetalForm mags to see how it does with hollow point ammo.
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# remat457 2011-10-11 16:44
pics fixed
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# remat457 2012-02-04 12:23
I am going to order 18 and 16 # Wolf springs and see how they work also. Dan Wesson put 16# in their PM.
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# post 2012-08-23 12:01
Nice post. Very useful information specially the last phase :) I take care of such info a lot. I was looking for this certain information for a long time. Thanks and best of luck.
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