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Posted: 11/21/2011 1:42:42 PM EDT
[Last Edit: 23pistol23]
[#1]
I was looking at getting an M&P 9, until I saw this thread.
I guess the 9mm barrel is still accurate? ETA what about changing the whole slide to a 9? That would make it accurate right? |
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Posted: 11/22/2011 4:09:08 PM EDT
[#2]
I just changed my order for my M&P based off this post. I had a M&P 9 on order and now I am getting a 40 instead. My question is the gun will come with 3 mags and I understand that 9mm ammo will work with the 40 mags but the last round will hang up. Are the tubes different? would a 9mm follower work in a 40 mag tube and feed all the rounds?
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Posted: 11/22/2011 4:32:54 PM EDT
[#3]
Originally Posted By 1-75Ranger:
I just changed my order for my M&P based off this post. I had a M&P 9 on order and now I am getting a 40 instead. My question is the gun will come with 3 mags and I understand that 9mm ammo will work with the 40 mags but the last round will hang up. Are the tubes different? would a 9mm follower work in a 40 mag tube and feed all the rounds? I don't know if the follow would work As cheap as M&P 9mm mags are, I would just order some. |
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Posted: 11/22/2011 4:41:55 PM EDT
[#4]
Well I already have three 9mm mags right now. A new follower is only 2 dollars, I am going to be using this gun for USPSA. so If I can make the 40 mags run 100% but changing the follower then I am all about that
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Posted: 11/22/2011 4:48:26 PM EDT
[#5]
Originally Posted By 1-75Ranger:
Well I already have three 9mm mags right now. A new follower is only 2 dollars, I am going to be using this gun for USPSA. so If I can make the 40 mags run 100% but changing the follower then I am all about that Ah, I see..that makes sense. |
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TX, USA
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Posted: 11/22/2011 9:55:29 PM EDT
[#6]
I use both 9 and 40 mags without a problem
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Posted: 11/22/2011 10:44:30 PM EDT
[#7]
What I am asking is, if I put a 9mm follower in the .40 S&W tube will the mag run 100%. I am plan on getting a 9mm conversion barrel and trying to get the 40 mags to run 100% with 9mm ammo.
Yes I already have 3 9mm mags but the gun comes with 3 more in .40 Like I said above I am planning on running this gun in USPSA so I am trying to get all the mags to run 9mm ammo 100% no early lock back |
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Posted: 11/23/2011 10:14:10 AM EDT
[#8]
Originally Posted By 1-75Ranger:
What I am asking is, if I put a 9mm follower in the .40 S&W tube will the mag run 100%. I am plan on getting a 9mm conversion barrel and trying to get the 40 mags to run 100% with 9mm ammo. Yes I already have 3 9mm mags but the gun comes with 3 more in .40 Like I said above I am planning on running this gun in USPSA so I am trying to get all the mags to run 9mm ammo 100% no early lock back Again, I dunno..I have never tried it. I have 15 9mm mags, so I never felt the need to bust'em down to try it. |
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NJ, USA
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Posted: 12/2/2011 11:34:06 AM EDT
[#9]
Don't know for sure, but my guess would be you'd potentially get reliability problems since the feed lips on the .40 mags are a smidge wider,
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FL, USA
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Posted: 12/3/2011 9:10:28 AM EDT
[#10]
I sure wish I had seen this post two M&P9s ago! This is great, thank you very much guys! I may have to get a .40 now and dump the 9s.
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Posted: 12/11/2011 3:40:31 PM EDT
[#11]
Little off topic, and possibly a stupid question.... but, has anyone tried this with FS barrels in a compact?
IE> M&P40C with a 9 or 357 FS barrel? I'm thinking about picking up a M&P40C to compliment my FS 9 and was curious if the FS barrels will work in a compact frame. Anyone tried this yet? |
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CT, USA
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Posted: 12/11/2011 4:33:15 PM EDT
[#12]
Originally Posted By glk34:
Originally Posted By urBock:
Hi guys great information, I can't wait to get a 9mm barrel. Has anyone tried using a full size barrel in a compact M&P ? Yup. Had a 40c at the range a few weeks back and put the M&PL barrel in it to see if it would work. It sure did! Ive been useing my factory 9 threaded barrel in my 40 slide and have not taken it out since I got it. Ive shot around 1k or a bit over in the last couple months with it and it hasnt failed me 1 time. To DEDX here you go, I think it was on page five... |
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Posted: 12/11/2011 4:41:39 PM EDT
[#13]
Originally Posted By 17:
Originally Posted By glk34:
Originally Posted By urBock:
Hi guys great information, I can't wait to get a 9mm barrel. Has anyone tried using a full size barrel in a compact M&P ? Yup. Had a 40c at the range a few weeks back and put the M&PL barrel in it to see if it would work. It sure did! Ive been useing my factory 9 threaded barrel in my 40 slide and have not taken it out since I got it. Ive shot around 1k or a bit over in the last couple months with it and it hasnt failed me 1 time. To DEDX here you go, I think it was on page five... Thanks! I guessed I zoned out a little reading the thread. 
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NV, USA
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Posted: 1/5/2012 3:24:45 PM EDT
[Last Edit: cacafuego]
[#14]
Okay, I have a 40c, bought a 9mm barrel and some magazines, and with the 9mm I'm having extraction problems. Slow fire, maybe 1 round in 100 will not extract; rapid fire (not mag dumps, but sustained fire for drills) it jumps to more like 1/25. Pistol has 5 or 600 rounds through it, about 400 of it 9mm.
Any ideas? Are the 9/40 extractors different? I really want to make this work... |
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Posted: 1/5/2012 3:58:01 PM EDT
[#15]
Originally Posted By cacafuego:
Okay, I have a 40c, bought a 9mm barrel and some magazines, and with the 9mm I'm having extraction problems. Slow fire, maybe 1 round in 100 will not extract; rapid fire (not mag dumps, but sustained fire for drills) it jumps to more like 1/25. Pistol has 5 or 600 rounds through it, about 400 of it 9mm. Any ideas? Are the 9/40 extractors different? I really want to make this work... I don't know about the compacts. I can tell you that the full sizes have the same extractors. I would assume that is the same for the compacts. |
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Posted: 1/5/2012 5:06:15 PM EDT
[#16]
Originally Posted By Dog1:
Originally Posted By cacafuego:
Okay, I have a 40c, bought a 9mm barrel and some magazines, and with the 9mm I'm having extraction problems. Slow fire, maybe 1 round in 100 will not extract; rapid fire (not mag dumps, but sustained fire for drills) it jumps to more like 1/25. Pistol has 5 or 600 rounds through it, about 400 of it 9mm. Any ideas? Are the 9/40 extractors different? I really want to make this work... I don't know about the compacts. I can tell you that the full sizes have the same extractors. I would assume that is the same for the compacts. They have the same extractors. I dunno, that seems weird for the gun to do that. |
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AZ, USA
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Posted: 1/21/2012 6:40:55 PM EDT
[#17]
Already did this on my full size .40. Just picked up a .40c so I'm looking to do the same on that. Of course everyone is out of stock on them. If anyone sees the 9mm compact barrel become available, please post it here.
ben |
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FL, USA
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Posted: 1/21/2012 7:38:15 PM EDT
[#18]
Originally Posted By armourbl:
Already did this on my full size .40. Just picked up a .40c so I'm looking to do the same on that. Of course everyone is out of stock on them. If anyone sees the 9mm compact barrel become available, please post it here. ben How did it function? |
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AZ, USA
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Posted: 1/22/2012 7:19:23 PM EDT
[#19]
Functioned awesome. Already have more than 100 rounds through it. Very accurate too.
I tried the full size barrel in my compact .40 and it wouldn't cycle. It was binding a little even before I tried to feed ammo from a mag. ben |
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VA, USA
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Posted: 1/28/2012 12:44:20 AM EDT
[Last Edit: Noahthered]
[#20]
I've looked through the thread and perhaps I missed it, but did not see a direct answer here.
My question is, if I have a M&P357, can I safely switch in a 40 or 9mm barrel for cheaper practice? Magazines exchanged, of course. (I see a lot of the discussion about going the otherway, but nothing about taking my lolexpensive 357 and making it a 9mm for practice) |
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Posted: 1/28/2012 10:09:13 AM EDT
[#21]
Originally Posted By Noahthered:
I've looked through the thread and perhaps I missed it, but did not see a direct answer here. My question is, if I have a M&P357, can I safely switch in a 40 or 9mm barrel for cheaper practice? Magazines exchanged, of course. (I see a lot of the discussion about going the otherway, but nothing about taking my lolexpensive 357 and making it a 9mm for practice) Yes. |
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TX, USA
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Posted: 2/8/2012 1:54:50 PM EDT
[#22]
Just picked up 2 9mm barrels in the EE for $100. Other than mags, anything else important I need? (yeah yeah ammo).
How are people's accuracy with this? |
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Posted: 2/8/2012 1:57:32 PM EDT
[#23]
Originally Posted By 33shooter:
Just picked up 2 9mm barrels in the EE for $100. Other than mags, anything else important I need? (yeah yeah ammo). How are people's accuracy with this? Nothing else is needed. I found that it was just as accurate as the 9mm M&P. |
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TX, USA
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Posted: 2/8/2012 2:12:17 PM EDT
[#24]
Originally Posted By Dog1:
Originally Posted By 33shooter:
Just picked up 2 9mm barrels in the EE for $100. Other than mags, anything else important I need? (yeah yeah ammo). How are people's accuracy with this? Nothing else is needed. I found that it was just as accurate as the 9mm M&P. This makes me VERY happy! I almost bought your threaded barrel the other day, but who knows if I'll ever buy a can for my pistols, I don't really need one. Glad I waited, now I have a matching pair LOL |
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FL, USA
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Posted: 2/8/2012 6:27:49 PM EDT
[#25]
So other than barrel & mags, is the internals of both pistols the same? Or just close enough to work with either caliber?
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TX, USA
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Posted: 2/8/2012 6:39:58 PM EDT
[#26]
Originally Posted By Packinaglock:
So other than barrel & mags, is the internals of both pistols the same? Or just close enough to work with either caliber? The way I've understood it. You can use 9mm barrels and mags in a .40 but not the other way around. So with 3 barrels, and 2 different types of mags, you can have 3 calibers. .40 and 357 Sig share the same mags, so you just need the 2 barrels. Then you'll need a 9mm barrel and mags to use 9 |
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Posted: 2/8/2012 6:48:17 PM EDT
[#27]
Originally Posted By Packinaglock:
So other than barrel & mags, is the internals of both pistols the same? Or just close enough to work with either caliber? Correct. If you look up the parts on Brownell's, the parts for both calibers are the same, with the exception of barrels and mags. |
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Posted: 2/8/2012 6:48:50 PM EDT
[#28]
Originally Posted By 33shooter:
Originally Posted By Dog1:
Originally Posted By 33shooter:
Just picked up 2 9mm barrels in the EE for $100. Other than mags, anything else important I need? (yeah yeah ammo). How are people's accuracy with this? Nothing else is needed. I found that it was just as accurate as the 9mm M&P. This makes me VERY happy! I almost bought your threaded barrel the other day, but who knows if I'll ever buy a can for my pistols, I don't really need one. Glad I waited, now I have a matching pair LOL Lol..I'm surprised it lasted as long as it did. |
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TX, USA
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Posted: 2/8/2012 8:20:26 PM EDT
[#29]
Originally Posted By Dog1:
Originally Posted By 33shooter:
Originally Posted By Dog1:
Originally Posted By 33shooter:
Just picked up 2 9mm barrels in the EE for $100. Other than mags, anything else important I need? (yeah yeah ammo). How are people's accuracy with this? Nothing else is needed. I found that it was just as accurate as the 9mm M&P. This makes me VERY happy! I almost bought your threaded barrel the other day, but who knows if I'll ever buy a can for my pistols, I don't really need one. Glad I waited, now I have a matching pair LOL Lol..I'm surprised it lasted as long as it did. I typed out "I'll take it" 3 times and deleted it prior to hitting submit each time. Just didn't need the threads. |
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Posted: 2/8/2012 8:24:45 PM EDT
[#30]
Originally Posted By 33shooter:
Originally Posted By Dog1:
Originally Posted By 33shooter:
Originally Posted By Dog1:
Originally Posted By 33shooter:
Just picked up 2 9mm barrels in the EE for $100. Other than mags, anything else important I need? (yeah yeah ammo). How are people's accuracy with this? Nothing else is needed. I found that it was just as accurate as the 9mm M&P. This makes me VERY happy! I almost bought your threaded barrel the other day, but who knows if I'll ever buy a can for my pistols, I don't really need one. Glad I waited, now I have a matching pair LOL Lol..I'm surprised it lasted as long as it did. I typed out "I'll take it" 3 times and deleted it prior to hitting submit each time. Just didn't need the threads. 
I have done that more times than I can remember over the years. |
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FL, USA
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Posted: 2/9/2012 4:02:23 AM EDT
[#31]
Originally Posted By Dog1:
Originally Posted By Packinaglock:
So other than barrel & mags, is the internals of both pistols the same? Or just close enough to work with either caliber? Correct. If you look up the parts on Brownell's, the parts for both calibers are the same, with the exception of barrels and mags. So in reality it should be as reliable as a factory S&W M&P 9c ? |
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Posted: 2/9/2012 8:16:36 AM EDT
[#32]
Originally Posted By Packinaglock:
Originally Posted By Dog1:
Originally Posted By Packinaglock:
So other than barrel & mags, is the internals of both pistols the same? Or just close enough to work with either caliber? Correct. If you look up the parts on Brownell's, the parts for both calibers are the same, with the exception of barrels and mags. So in reality it should be as reliable as a factory S&W M&P 9c ? I don't see why not. Like every firearm, you should run enough rounds thorugh it to make sure it's reliable, before counting on it for protection. |
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TX, USA
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Posted: 2/12/2012 4:12:21 PM EDT
[#33]
I ran a box of 124grn +p fmj through my gun using the .40 mags. It has NO recoil! I've admittedly never shot 9mm before and now I have no idea why. This was simply the best mod I could have done. Groups were the same. Function was fine, save for 3 mag related failures. Thank you Dog1, very informational thread!!
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NV, USA
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Posted: 2/16/2012 3:24:19 AM EDT
[#34]
Originally Posted By Dog1:
Originally Posted By Packinaglock:
Originally Posted By Dog1:
Originally Posted By Packinaglock:
So other than barrel & mags, is the internals of both pistols the same? Or just close enough to work with either caliber? Correct. If you look up the parts on Brownell's, the parts for both calibers are the same, with the exception of barrels and mags. So in reality it should be as reliable as a factory S&W M&P 9c ? I don't see why not. Like every firearm, you should run enough rounds thorugh it to make sure it's reliable, before counting on it for protection. But THAT WASN'T MY EXPERIENCE. My 40c ran fine at the range with the factory 9mm barrel, but in a handgun class, during sustained fire, it choked CONSTANTLY, more than once per magazine. It simply would not extract reliably. Maybe I'm just unlucky (I have a Taurus that runs beautifully, maybe I used up all my luck there), but the caliber conversion simply isn't a 100% proposition. |
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Posted: 2/16/2012 1:57:04 PM EDT
[#35]
Originally Posted By cacafuego:
Originally Posted By Dog1:
Originally Posted By Packinaglock:
Originally Posted By Dog1:
Originally Posted By Packinaglock:
So other than barrel & mags, is the internals of both pistols the same? Or just close enough to work with either caliber? Correct. If you look up the parts on Brownell's, the parts for both calibers are the same, with the exception of barrels and mags. So in reality it should be as reliable as a factory S&W M&P 9c ? I don't see why not. Like every firearm, you should run enough rounds thorugh it to make sure it's reliable, before counting on it for protection. But THAT WASN'T MY EXPERIENCE. My 40c ran fine at the range with the factory 9mm barrel, but in a handgun class, during sustained fire, it choked CONSTANTLY, more than once per magazine. It simply would not extract reliably. Maybe I'm just unlucky (I have a Taurus that runs beautifully, maybe I used up all my luck there), but the caliber conversion simply isn't a 100% proposition. Perhaps it's a compact thing. I dunno. My fullsize runs 100% with it. Fast, slow, double taps. |
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NC, USA
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Posted: 2/19/2012 11:17:06 AM EDT
[#36]
Such a great thread! I have a M&P40c and was considering getting a 9, I can't believe I didn't think of or consider this sooner! Thanks so much, I am going to order a 9mm Barrel as soon as I can find one back in stock.
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Posted: 2/23/2012 12:42:20 AM EDT
[#37]
Might be a silly question, as this thread is mainly about factory barrels, but would this hold true with aftermarket barrels such as dropping a threaded 9mm Storm Lake barrel into a .40?
Posted Via AR15.Com Mobile |
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Posted: 2/23/2012 1:01:49 AM EDT
[#38]
If it has the same OD you should be fine. If I may ask a question, how come you want a Storm Lake barrel?
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TX, USA
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Posted: 2/23/2012 3:39:22 AM EDT
[#39]
Originally Posted By southlak9cop:
Might be a silly question, as this thread is mainly about factory barrels, but would this hold true with aftermarket barrels such as dropping a threaded 9mm Storm Lake barrel into a .40? Posted Via AR15.Com Mobile If you are springing for the storm lake threaded barrel, they make a "conversion" barrel that is threaded for just that purpose, though I suspect that they are the same. |
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MI, USA
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Posted: 2/23/2012 5:02:57 PM EDT
[#40]
If anyone sees the M&P9c barrels in stock anywhere please post up or better PM me, I've been searching like crazy the last we days and haven't found anything.
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Posted: 2/24/2012 12:42:51 PM EDT
[#41]
Originally Posted By TheTacticalCoyote:
If it has the same OD you should be fine. If I may ask a question, how come you want a Storm Lake barrel? Well, if I can find a factory threaded 9mm barrel, that'd be ok too, since you guys have verified the OEM barrels work without issue. I had a threaded Storm Lake barrel in my full size .45 M&P and found it to shoot tighter groups than the standard factory barrel. |
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Posted: 2/24/2012 4:26:15 PM EDT
[#42]
Originally Posted By southlak9cop:
Originally Posted By TheTacticalCoyote:
If it has the same OD you should be fine. If I may ask a question, how come you want a Storm Lake barrel? Well, if I can find a factory threaded 9mm barrel, that'd be ok too, since you guys have verified the OEM barrels work without issue. I had a threaded Storm Lake barrel in my full size .45 M&P and found it to shoot tighter groups than the standard factory barrel. Ok cool, just wondering. You can check the EE and supposedly Gemtech has a good price for them with a thread protector. (Gemtech makes them for S&W.) |
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Posted: 2/26/2012 11:12:09 AM EDT
[#43]
Thought I would add this. Just picked up a 9mm barrel for my m&P40 (mfg feb 12), I noticed its the opposite of yours. Mine does have some play when it locks up with out the recoil spring in place. I have a fealing the shelf on the front of the chamber makes it lock up tighter. Have you found this to be true. Next ? over on the M&P forum's they swear that this does not work. That you need a conversion barrel?
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Posted: 2/26/2012 12:07:03 PM EDT
[#44]
Originally Posted By rescueswimmer:
Thought I would add this. Just picked up a 9mm barrel for my m&P40 (mfg feb 12), I noticed its the opposite of yours. Mine does have some play when it locks up with out the recoil spring in place. I have a fealing the shelf on the front of the chamber makes it lock up tighter. Have you found this to be true. Next ? over on the M&P forum's they swear that this does not work. That you need a conversion barrel? http://i190.photobucket.com/albums/z302/rescueswimmer1/2012-02-26100035.jpg Have you installed it with the recoil spring and put the slide on the frame? Does it cycle? |
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Posted: 2/26/2012 12:12:24 PM EDT
[#45]
Have not had a chance to shoot it yet since I got the 9mm barrel. It hand cycles, When it is all put together it fits good. Its just when I set the barrel in the slide with out anything. It moves around allot more than the 40. Im guessing its the shelf on the front that causes the 40 to lock up tighter.
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Posted: 2/26/2012 12:15:15 PM EDT
[#46]
Originally Posted By rescueswimmer:
Have not had a chance to shoot it yet since I got the 9mm barrel. It hand cycles, When it is all put together it fits good. Its just when I set the barrel in the slide with out anything. It moves around allot more than the 40. Im guessing its the shelf on the front that causes the 40 to lock up tighter. What kind of play are you getting? Up/down, side-to-side, front to back or all around? |
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Posted: 2/26/2012 2:33:56 PM EDT
[Last Edit: rescueswimmer]
[#47]
Not a lot just a few thousandths but like I said, I believe its the lip on the front of the 40 barrel since its square and not round like the one on the 9mm barrel that gives the appearance of the slop. Kind of funny how our barrels are reversed. Your 40 is round, mine is flat, Got to love uniformity. On reason I had any doubt was that everything that I had read on the MP forum they all said it would not work, or was not advised because it does not lock up like the factory 40 barrel.
Of course my micrometer has dead batteries but using the rough measurements that I can do. The 9mm barrel definitely is smaller. I'll post some pics tomorrow with measurements. RS |
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Posted: 2/27/2012 4:24:02 PM EDT
[#48]
Well, I hope everything in this thread is right, lol. I just got off of the phone with Gemtech, they have threaded 9mm fullsize barrels in stock. $181 with shipping.
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CA, USA
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Posted: 3/8/2012 1:22:23 AM EDT
[#49]
I was going to buy a 9mm FS but now am leaning towards the .40. Is there any reason to believe this would cause more wear and tear on the pistol over a long period of time? Sorry to sound prudish when it comes to this but I wouldn't want to jeopardize my pistol doing the swap back and fourth often. Thanks in advance. -Ben
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Posted: 3/8/2012 7:45:31 AM EDT
[#50]
Originally Posted By BePhreed:
I was going to buy a 9mm FS but now am leaning towards the .40. Is there any reason to believe this would cause more wear and tear on the pistol over a long period of time? Sorry to sound prudish when it comes to this but I wouldn't want to jeopardize my pistol doing the swap back and fourth often. Thanks in advance. -Ben I don't see any reason to be concerned with undue wear by swapping them out. |
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