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Converting 9mm to 40 single stack


jimbullet

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I have been contemplating on a new project. Given the limited availability of 40 cal single stack 1911s out there, I am thinking of building one. I have a Springfield Armory Loaded 1911 in 9mm. Would it be possible to convert this into a 40 cal?

I would need to change the entire upper I would imagine, i.e. slide, barrel as well as the ejector. Is it possible?

Cheers

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I have been contemplating on a new project. Given the limited availability of 40 cal single stack 1911s out there, I am thinking of building one. I have a Springfield Armory Loaded 1911 in 9mm. Would it be possible to convert this into a 40 cal?

I would need to change the entire upper I would imagine, i.e. slide, barrel as well as the ejector. Is it possible?

Cheers

Guaranteed possible. I did the exact same thing when I had a .40 top end built to go on my 9mm Trojan.

I had it done by a gunsmith and it ended up costing about 75% of what a new gun would cost. I had to do it tht way because the guns are no longer legal to purchase here in kali. For you, buying a second used gun probably makes more sense (unless you can do the work yourself). YMMV

On mine, had to go with complete upper (slide/barrel assembly) but bottom end remains the same. Didn't need to change ejector or slide stop between calibers.

Edited by bountyhunter
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You really can't do 40 and 45 on the same lower because, unlike 9 and 40, the ejectors are different. If you want to switch ejectors every time you change calibers, that will work. But it's a bit of a chore, and beyond what most folks are willing (or able) to do.

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I'm using a para frame so both barrel are ramp. Gun is currently set as 45, I will find out soon if the 40 upper will work, if not I guess I just have to change the ejector when switching uppers.

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I have been contemplating on a new project. Given the limited availability of 40 cal single stack 1911s out there, I am thinking of building one. I have a Springfield Armory Loaded 1911 in 9mm. Would it be possible to convert this into a 40 cal?

I would need to change the entire upper I would imagine, i.e. slide, barrel as well as the ejector. Is it possible?

Cheers

I have a Para Pro comp 40 slide here with sights already, I was planning of doing a single stack 40 project lastyear but then its hard to buy a frame because i live in california, pm me. thanks

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I have been contemplating on a new project. Given the limited availability of 40 cal single stack 1911s out there, I am thinking of building one. I have a Springfield Armory Loaded 1911 in 9mm. Would it be possible to convert this into a 40 cal?

I would need to change the entire upper I would imagine, i.e. slide, barrel as well as the ejector. Is it possible?

Cheers

I have a Para Pro comp 40 slide here with sights already, I was planning of doing a single stack 40 project lastyear but then its hard to buy a frame because i live in california, pm me. thanks

PM sent

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