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Old 02-25-2013, 14:39   #1
cyphertext
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New barrel specs for M&P 15 Sport

For anyone in the market for the M&P 15 Sport, it appears that they have changed the barrel. On another forum, two members posted that their recent purchases of the Sport came with a 1/9 twist barrel, vs. the 1/8 twist previously on the Sport. I called S&W customer support to confirm, and "Joe" advised that they have changed the spec, and that the Sport will now ship with a Melonite treated, 1/9 twist barrel. If you want the 1/8 twist barrel, you will need to purchase the M&P 15T.

Still trying to confirm if it is still 5R rifling or if it is the traditional rifling.
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Old 02-25-2013, 16:37   #2
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Quote:
Originally Posted by cyphertext View Post
For anyone in the market for the M&P 15 Sport, it appears that they have changed the barrel. On another forum, two members posted that their recent purchases of the Sport came with a 1/9 twist barrel, vs. the 1/8 twist previously on the Sport. I called S&W customer support to confirm, and "Joe" advised that they have changed the spec, and that the Sport will now ship with a Melonite treated, 1/9 twist barrel. If you want the 1/8 twist barrel, you will need to purchase the M&P 15T.

Still trying to confirm if it is still 5R rifling or if it is the traditional rifling.
That's unfortunate. I thought using the 1/8 was a pretty ingenious decision. It's a great all-around twist rate.
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Old 02-25-2013, 17:24   #3
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They are probably sourcing the Sport 1/9 barrels at a lower cost.
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Old 02-25-2013, 18:05   #4
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Bad move on S&Ws part.
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Old 02-25-2013, 18:38   #5
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Bad move on S&Ws part.
I agree. The barrel was the high point of the rifle! Glad I got mine last year before they did this.
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Old 02-25-2013, 19:48   #6
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Again, why dick around with something that works?
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Old 02-25-2013, 19:52   #7
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Again, why dick around with something that works?
Because someone was an idiot.

Anyone know if S&W was doing the 1/8 barrels in house, or if they were outsourced?
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Old 02-25-2013, 19:59   #8
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Originally Posted by WoodenPlank View Post
Because someone was an idiot.

Anyone know if S&W was doing the 1/8 barrels in house, or if they were outsourced?
They were produced by Thompson Center, which S&W owns, from everything that I have read.
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Old 02-26-2013, 09:17   #9
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Grant from G&R Tactical has also confirmed that there will be no more barrels with 5R rifling for the Sport. The 1:8 twist with 5R rifling barrels are being held for the "premium" lines, the VTAC II, the MOE, and the 15T.

Grant said that the S&W rep told him the reason for the change is the 5R rifled barrels were a production bottleneck and no one wants to make them.
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Old 02-26-2013, 20:38   #10
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interesting
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Old 02-28-2013, 19:44   #11
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I agree. The barrel was the high point of the rifle! Glad I got mine last year before they did this.
Me too.

Sent from up range, at about 3100 fps
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