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The Range
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M&P conversion barrels
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<blockquote data-quote="NightShade" data-source="post: 3078048" data-attributes="member: 29706"><p>I believe that most of the 10MM's are not polymer except for one that Glock made. That would give the weapon a little more mass reducing the perceived recoil and making them feel more accurate IMHO. I have had no issues with my 40 and I am sure it is probably much more accurate than I am.</p><p></p><p></p><p>As far as the OP I didn't buy into the "conversion" barrels. I just bought a factory 9mm and 357SIG barrel for my M&P and I can say that the 9mm works flawlessly. I in fact used it for a USPSA and over the course had no failures due to the barrel. The one issue I had was I did not have 9mm mags and was using the 40S&W mags so the last round could be a pain and a couple of the rounds popped out in my pocket.</p><p></p><p>The bad thing is to get them you have to troll some place that gets them in and when it's available click the buy button or just backorder it and wait. I got mine through <a href="https://www.midwayusa.com/product/1004410793/smith-and-wesson-barrel-s-and-w-m-and-p-9mm-luger-425" target="_blank">MidwayUSA</a> and the price is less than half of the conversion barrels. The Pro M&P's are harder to find and the 9mm one is more common than the 40 so their a conversion barrel is pretty much what you are stuck with unless you bought the 40 and can find the 9mm. As far as I know there are no 357SIG barrels available in the PRO unless you but a conversion. If you want a threaded one it's as equally hard to find as the PRO for factory barrels so again better off buying an aftermarket one.</p><p></p><p>With the correct mags however I would have ZERO doubts about carrying any one of the barrels I have in my M&P. It's all factory and works just fine. I researched before buying a conversion as a lot of people were saying the recoil spring was different or that the mating surface would have gaps and that just has not been the case. The same factory spring is marketed for them both and the surfaces match up just fine. In fact one thing I did learn is that most 40's and 357SIG's would probably be better off with a slightly heavier recoil spring (17 to 20 pounds) than what comes from the factory which is supposed to be around 16 pounds. And if you want to run hotter 9mm loads you would also want to increase the recoil spring to something slightly higher.</p></blockquote><p></p>
[QUOTE="NightShade, post: 3078048, member: 29706"] I believe that most of the 10MM's are not polymer except for one that Glock made. That would give the weapon a little more mass reducing the perceived recoil and making them feel more accurate IMHO. I have had no issues with my 40 and I am sure it is probably much more accurate than I am. As far as the OP I didn't buy into the "conversion" barrels. I just bought a factory 9mm and 357SIG barrel for my M&P and I can say that the 9mm works flawlessly. I in fact used it for a USPSA and over the course had no failures due to the barrel. The one issue I had was I did not have 9mm mags and was using the 40S&W mags so the last round could be a pain and a couple of the rounds popped out in my pocket. The bad thing is to get them you have to troll some place that gets them in and when it's available click the buy button or just backorder it and wait. I got mine through [URL='https://www.midwayusa.com/product/1004410793/smith-and-wesson-barrel-s-and-w-m-and-p-9mm-luger-425']MidwayUSA[/URL] and the price is less than half of the conversion barrels. The Pro M&P's are harder to find and the 9mm one is more common than the 40 so their a conversion barrel is pretty much what you are stuck with unless you bought the 40 and can find the 9mm. As far as I know there are no 357SIG barrels available in the PRO unless you but a conversion. If you want a threaded one it's as equally hard to find as the PRO for factory barrels so again better off buying an aftermarket one. With the correct mags however I would have ZERO doubts about carrying any one of the barrels I have in my M&P. It's all factory and works just fine. I researched before buying a conversion as a lot of people were saying the recoil spring was different or that the mating surface would have gaps and that just has not been the case. The same factory spring is marketed for them both and the surfaces match up just fine. In fact one thing I did learn is that most 40's and 357SIG's would probably be better off with a slightly heavier recoil spring (17 to 20 pounds) than what comes from the factory which is supposed to be around 16 pounds. And if you want to run hotter 9mm loads you would also want to increase the recoil spring to something slightly higher. [/QUOTE]
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