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Sig P250 and P320 barrel compatability question.

This is a discussion on Sig P250 and P320 barrel compatability question. within the P250, P320, & P320 X-5 Pistols forums, part of the SIG Sauer Pistols category; New here. My question is general and specific. Will a barrel made for a P250 also fit the corresponding sized P320 like SC to SC, ...


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P250, P320, & P320 X-5 Pistols P250, P320, & P320 X-5 Pistols

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Old 07-13-2020, 02:55 PM   #1
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Sig P250 and P320 barrel compatability question.

New here. My question is general and specific. Will a barrel made for a P250 also fit the corresponding sized P320 like SC to SC, etc. of each?

I have a P320 9mm Sub Compact that I would like to convert to a .357Sig by purchasing the .40cal SC slide from the Sig Sauer website.

I picked up a .357Sig 3.6" barrel that says it's for the P250. Will it fit the new .40cal SC P320 slide?

Last edited by FearDaBeak; 07-13-2020 at 08:27 PM.
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Old 07-13-2020, 09:54 PM   #2
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Yes it works. Sig never officially made a P320 357 SC slide or conversion but that does work I did the same thing
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Old 07-14-2020, 08:47 AM   #3
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Yes it works. Sig never officially made a P320 357 SC slide or conversion but that does work I did the same thing
Thanks for the info! I may pick up the .40cal slide off of their site and use the .357sig barrel I have.

Follow up question: can I use the 9mm recoil spring and guide rod or do I need to find a .40S&W version?
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Old 07-15-2020, 03:23 AM   #4
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Follow up question: can I use the 9mm recoil spring and guide rod or do I need to find a .40S&W version?
You need a 40 spring.


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Old 07-15-2020, 08:09 AM   #5
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Thanks for your input! That may be a deal breaker since finding the .40 guide rod and spring seems nearly impossible. May just get the P320 in .357sig from Lawmens.com. Any more advice is appreciated.
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