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Old 01-09-2017, 09:44 PM
mikesal34744 mikesal34744 is offline
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M&P barrel vs Sig M&P barrel vs Sig M&P barrel vs Sig M&P barrel vs Sig M&P barrel vs Sig  
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Default M&P barrel vs Sig

I love my Sigs and Smiths and know they're durable and made to last. I happen to be cleaning both my P229 Sig 9mm and my M&P M2.0 FDE 9mm at the same time and realized the M&P barrel was so much thicker next to the Sig barrel. It looks like S&W makes some them extra heavy duty.

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Old 01-11-2017, 08:30 AM
gqllc007 gqllc007 is offline
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Thats so they can use the same slide for the other calibers. The barrel of the 9mm is thicker to accommodate the larger slide opening for .40
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Old 01-11-2017, 09:42 AM
Arik Arik is offline
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M&P barrel vs Sig M&P barrel vs Sig M&P barrel vs Sig M&P barrel vs Sig M&P barrel vs Sig  
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Originally Posted by gqllc007 View Post
Thats so they can use the same slide for the other calibers. The barrel of the 9mm is thicker to accommodate the larger slide opening for .40
This ^^^

It's basically a filler. If you were trying to put a 9mm barrel into a 45acp slide the barrel would be even thicker. In the end only the lands and groves really matter

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Old 01-11-2017, 03:28 PM
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CB3 CB3 is offline
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In the end only the lands and groves really matter
This is not true. While the Sig barrel pictured is safe and serviceable, a thicker barrel is stiffer, has less whip, is safer in any kind of over-pressure event, and while heavier, may contribute to improved handling characteristics.

There is a point of diminishing returns on making a barrel thinner.
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Old 01-11-2017, 03:40 PM
MN2944 MN2944 is offline
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This is not true. While the Sig barrel pictured is safe and serviceable, a thicker barrel is stiffer, has less whip, is safer in any kind of over-pressure event, and while heavier, may contribute to improved handling characteristics.
I doubt that barrel whip is much of a factor when you are talking about 4-5". Rifles are a different deal. Beyond that, I've never heard of a Sig barrel developing muzzle splits the way the M&P 1.0 did in some calibers.
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Old 01-18-2017, 11:02 PM
mikesal34744 mikesal34744 is offline
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It might be to mitigate recoil and have a certain balance in the gun. Who knows, but I love them both.

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