SIGforum
Upsizing from 9 to 40

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https://sigforum.com/eve/forums/a/tpc/f/430601935/m/2850059605

February 24, 2024, 09:21 AM
badguybuster
Upsizing from 9 to 40
My google-fu has failed me so I figure I will ask the experts Is it feasible to upsize a 226 x-five from 9mm to 40/357 sig? The mags fit fine but I am not sure about the interchangeability of the rest


"Dyin ain't much of a livin...boy"
February 24, 2024, 10:45 AM
sigfreund
Although I am not familiar with the X-Five models, the slides for 9mm and 357/40 are different. The latter are usually somewhat heavier and the main thing is they have larger breech faces. A 40 S&W case would not fit the 9mm face.




6.0/94.0

I can tell at sight a Chassepot rifle from a javelin.
February 24, 2024, 12:31 PM
badguybuster
I figured as much dang it


"Dyin ain't much of a livin...boy"
February 24, 2024, 02:07 PM
colt_saa
quote:
Originally posted by badguybuster:
My google-fu has failed me so I figure I will ask the experts Is it feasible to upsize a 226 x-five from 9mm to 40/357 sig? The mags fit fine but I am not sure about the interchangeability of the rest

It would require a different slide assembly

At least the Original X-5s and X-6s had the slides hand lapped when they were built in the Mastershop



A conversion kit would change the wear pattern on the frame, probably reducing accuracy when you switched back to 9MM

Now 95% of the shooters in America would probably never see the difference

That being said, Germany did offer a 6" 9MM conversion for the P220 X-6 but I never met anyone that bought one. The cost was not too different than picking up P226 X-5 instead

However, I like to keep my Mastershop pistols original

All of my X-5s and X-6s are 9MM except I do have an Allround in 357SIG and a P220 X-6 in 45ACP




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