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AR15.COM
6/23/2012 2:48:31 PM EDT
Will STI build a gun that is convertible from .40 s&w to 10mm? with just a barrel and mag swap?

is  this possible or am I just dreaming?

can it even be done?

I'm thinking a 5.0 Tactical.
6/23/2012 7:48:42 PM EDT
[#1]
Not sure if STI will fit a 10mm barrel to your STI 40 or not.  I think.that Dawson would fit a 10mm barrel  if you bought it from them.  You shouldn't different mags.  I have an SVI, Para P16 and a Springfield SS that have 10mm barrels fitted to them. The SVI & P16 work with the 40 S&W mags.  Good luck.
6/23/2012 8:30:25 PM EDT
[#2]
mags are the same.

you could buy a 40 and have a 10mm barrel fitted.

you'll need to swap the recoil spring also
6/23/2012 8:54:17 PM EDT
[#3]
I was reading somewhere that with a 10mm 1911, you could shoot .40 out of it.


I can not recall where it was or if it actually worked more than a handful of times, but interesting nonetheless.


6/24/2012 6:05:35 AM EDT
[#4]
GAZ32...although they are designed to headspace on the case mouth, they may also headspace on the extractor, and will fire.... I had a friend that was transitioning from a .45 to .38super in the early days of USPSA down here,  a round of .38super got loaded by mistake, and fired in the .45... a funny looking case extracted, it had split and came out like a sheet of nickled brass....
6/24/2012 9:27:16 AM EDT
[#5]
Ah headspacing on the extractor, that was it.

Sorry to hijack OP! Carry on.
6/24/2012 10:54:46 AM EDT
[#6]
i would check with dave dawson, STI, or even try to contact Infinity and see if they will do it (but its going to be big $$$$ though)

If none of that works, there is a man named Eddie Jiminea that lives in sugarland/stafford Tx who is active in the IPSC community and is a master gunsmith who specializes in STI race guns. It would be a bit like you hiking into the mountains of china to have a ninja sword made by some super old long whispy bearded guy, but its an option if you're motivated enough.
6/24/2012 1:23:59 PM EDT
[#7]
I went the other way, fitting a .40 barrel to a 10mm Dan Wesson.   Barrel and recoil spring is all you need.   I doubt STI will do it, since their custom shop is on hiatus, but there are dozens of good shops who could do it.   Brazos Custom and Dawson to name two.
6/25/2012 4:03:37 AM EDT
[#8]
Can be done, lots of gunsmiths can do it. Barrel and recoil spring.  Hell you may be able to do it yourself.