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Barrel Conversion Tables

This is a discussion on Barrel Conversion Tables within the SIG Sauer Gunsmithing forums, part of the SIG Sauer Forum category; So the jist is, with the modern SIGs, they all use the same barrels, just drilled to different calibers? So a 9mm barrel will work ...


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Old 03-13-2016, 10:10 AM   #76
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So the jist is, with the modern SIGs, they all use the same barrels, just drilled to different calibers? So a 9mm barrel will work in a .40 slide with no problems? I suspected this when i got a 9mm conversion kit for my one 229. The barrel fit perfectly in the slide, I didn't think i need the the new slide at all. Is this true? The older 229s I know this wont work, but with the 224 or the 229-1 i think it will. Am i wrong?
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Old 03-13-2016, 10:22 AM   #77
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Originally Posted by SamuraiMugen View Post
So the jist is, with the modern SIGs, they all use the same barrels, just drilled to different calibers? So a 9mm barrel will work in a .40 slide with no problems? I suspected this when i got a 9mm conversion kit for my one 229. The barrel fit perfectly in the slide, I didn't think i need the the new slide at all. Is this true? The older 229s I know this wont work, but with the 224 or the 229-1 i think it will. Am i wrong?
No, please look at the table. They don't use the same barrels across the board.
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Old 04-01-2016, 06:54 AM   #78
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If I'm reading the table right I can buy a regular 9mm barrel and drop it in my 226 , swap the recoil springs and be good to go? No need for a conversion barrel or slide/barrel kit? I didn't realize that. I just stumbled across this thread.

How much would sites be off switching from .40 to 9 or would it matter?
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Old 05-07-2016, 05:30 PM   #79
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Originally Posted by Eric357 View Post
If I'm reading the table right I can buy a regular 9mm barrel and drop it in my 226 , swap the recoil springs and be good to go? No need for a conversion barrel or slide/barrel kit? I didn't realize that. I just stumbled across this thread.

How much would sites be off switching from .40 to 9 or would it matter?
I just saw your question. Yes all you need is a barrel, recoil spring, and a magazine to convert to 9mm. You might want to label the bottom of the mag's to tell the difference between calibers. With mine, I have the Mecgar AFC mag's with the plastic base or plus two base for the 40. For my 9mm I use the standard metal base mag's.

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Old 05-11-2016, 05:52 PM   #80
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I loaded 9mm rounds in my Sig .40/357 magazine and discovered that the first 5 or 6 rounds would feed and then the remaining rounds would just rattle around loose in the mag because the P229 40/357 mags are double stack. I tested this multiple times and had to take the mag apart each time to get the rounds out. If you have a P229 .40 cal and convert to 9mm, I believe you will need 9mm mags. Am I wrong?
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Old 06-14-2016, 06:12 PM   #81
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I am the proud owner of a NIB old stock P226R BSS model in.40 cal. I recently purchased a .357 Sig bbl from e-cop for $172. on e-bay and it will not install on my pistol. I noticed slight variation in the machining as the barrel meets the block and a portion of the catch is not concave as it is on the Top Gun Supply pic. of the .357 bbl. The one I bought was a SIG 357 replacement bbl. My guess is that there is a special barrel to make it work with my 226. E-cop will probably not pay for shipping from what I am told via phone and may charge a restocking fee as well. Anyone have a P226 that went from .40 to .357? Any help would be appreciated.
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Old 06-14-2016, 06:41 PM   #82
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If it's a genuine SIG barrel for the P226 then I don't think there should be a problem. Can you post a pic of the two barrels (side and top view)?

Last edited by ThnkFrst; 06-14-2016 at 07:04 PM. Reason: Correct spelling error.
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Old 06-18-2016, 01:50 PM   #83
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Answering post #82 from ThnkFrst;

Thanx for your reply. It is a genuine SIG barrel that the slide will not close on. I did compare w/ pic on SIG website of drop in 357 bbl and the one I received from e-cop looks identical. Should just drop in, so I am perplexed. The bottom edge of ramp on the barrel is hitting the back of the cutout on the steel locking insert in the frame. I see no remedy for that.
I would love to post pics but am technically challenged at the time, but will try to learn at some point. I have been working a lot of hours & come home beat. I don't normally get to this forum or even set up my laptop until the weekend. I still have the bbl, but I need to send it back next week. I was trying to speak to e-cop to see if they are going to charge re$tock fee and how much!
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Old 06-18-2016, 04:05 PM   #84
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It's not at all unusual for a new barrel to need some fitting; they don't all drop in and function. Sounds like yours needs to move up in the slide a bit more for the barrel feed ramp to clear the locking insert.
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Old 07-21-2016, 07:28 AM   #85
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Updated table reflecting P220 options.
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