1911 to 40sw

[Iroquois]

I have an old army 45 and an extra slide which I'd like to change to 40Cal.
What do I need to do to accomplish this and still convert back to 45...
Anybody know for sure.

 

[gunman41mag]

Is the extra slide for a 40 S&W ? recoil spring, & a 40 S&W 1911 mag

 

[Double T]

Ejector is different length if I recall as well.

 

[Iroquois]

Nope...all original 45acp...getting ready to order mag and barrel.

 

[khickey3492]

If the slide is originally made for .45 Auto, the breechface will be too wide for .40 S&W, the extractor will not line up, and as previously mentioned the ejector length is different.

 

[Hogwylde]

Get a slide for a Delta Elite in 10mm. The 40 s&w is basically a shortened 10mm. Same case size, just a diffent length. The breachface will be the same. Get some Delta Elite magazines too (I have one I haven't gotten rid of yet) and a barrel for 40 s&w. Once you have all the above, you can switch back and forth at will.