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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, 09:10 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, 09:22 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, 05:54 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, 04:30 PM   #79
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Quote:
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, 04:52 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, 05:12 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, 05:41 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 06:04 PM. Reason: Correct spelling error.
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Old 06-18-2016, 12:50 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, 03:05 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, 06:28 AM   #85
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Updated table reflecting P220 options.
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Old 02-15-2017, 08:39 PM   #86
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Barrel Conversion Side Note

You can run a 9mm barrel in a P226 and P229 chambered in .40 S&W or .357 Sig. You'll of course need a 9mm mag. The secret is to change out the locking block to a 9mm locking block. Bar-Sto also claims to have a 9mm drop-in. The one I tried did not work in my "94" P229. I had do a couple modifications. Now it runs with no problems. But it's easier to just change out the Locking Block.

On the P220, I saw a video on Youtube of a guy trying a 10mm barrel in a >45 ACP frame. The barrel fit the slide, put when he tried to mount the slide it hung up on the locking block just like in a 226 or 229. I'm wondering, if you again change the locking block to a 10mm if it would work. 10mm has a higher chamber pressure than a .45. Is the 10mm slide from Sig beefed up in any way.
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Old 02-16-2017, 01:28 AM   #87
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Originally Posted by 1Seeker View Post
You can run a 9mm barrel in a P226 and P229 chambered in .40 S&W or .357 Sig. You'll of course need a 9mm mag. The secret is to change out the locking block to a 9mm locking block. Bar-Sto also claims to have a 9mm drop-in. The one I tried did not work in my "94" P229. I had do a couple modifications. Now it runs with no problems. But it's easier to just change out the Locking Block.
As I read this, it is apparent to me you claim the P229 OEM 9mm barrel will drop right into a P229 slide chambered in 40 or 357. Also, a 9mm locking insert is not required for the P226 conversion, nor will it lead to a successful P229 conversion. Each of these claims you make are incorrect.

Regarding the Bar-sto conversion barrels, I am unaware any claims by Bar-sto it will drop right in. Out of curiosity, what modifications did you make to get it to fit your SIG?

Last edited by Malicious Compliance; 02-16-2017 at 01:34 AM.
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Old 02-16-2017, 10:43 AM   #88
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Agreed with MC. The consensus on the P229 is that the 9mm OEM bbl is not compatible with the larger caliber variants.

Observations also show that the OEM 9mm bbl is tapered to a slimmer profile than the larger caliber variants while the P226's bbl variants all seem to have the same taper. This seems to be one of the major hurdles for the P229. The below images are directly from the Sig Website's Store for P229 bbls. You can research the images for the P226, P224, and P239 on your own.







Last edited by anbuyoshi; 02-16-2017 at 10:48 AM.
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