M&P 40 9mm conversion barrel
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wow6599
Member
I looked at their website and couldn't find anything on M&P conversions? Did you call and get the ordering info? Also, did they have a .22 con. for the M&P?
I have been told that there would not be a 9mm or .22lr conversion for M&P's untill the 3rd quarter of the year.
I have been told that there would not be a 9mm or .22lr conversion for M&P's untill the 3rd quarter of the year.
Nope, found it here http://www.gunbarrelsupply.com/item/75899_Barrels__Choke_Tubes_Storm_Lake_Storm_Lake_Barrel__Smith_.aspx it's a Storm Lake aftermarket barrel. For $110 shipped if it works it will be perfect! I'm not a big fan of the .40S&W round so this would be great if I can get it to function.
M47 Dragon
Member
I'm guessing you will need to get 9mm mags for it to work.
Claude Clay
Member
single stack sig p239- 40/357 mags work perfectly with the 9
YMMV
YMMV
Finally received my StormLake 9mm conversion barrel. It dropped in just fine and I hand cycled some rounds through it using the .40S&W magazine. Only issue is the slide is locked back with one last round in the mag. Not a real big issue, but I might want to pick up a 9mm magazine. I might need a 9mm recoil spring, but I'll hit the range tomorrow to try it out.
SimpleIsGood229
Member
I know this isn't much help, but SIG and Glock .40/.357-to-9mm conversions typically work with the .40 mags.
Jim Watson
Member
Why did you buy the gun, then?
I don't understand the present fad of buying big and shooting small.
MT GUNNY
Member
This is prolly a stupid Q but dont you have to change the slide also?
Harley Quinn
Member
Yep you need the mag, different bullet size, the lips on the mags are different.
I found that to be true when doing something similar with a 45 glock mdl 21 and shooting the 10 mm in it, new barrel and mags.
I found that to be true when doing something similar with a 45 glock mdl 21 and shooting the 10 mm in it, new barrel and mags.
Impulse buy a couple years ago when they were first out. I don't really have trouble shooting the .40S&W, it's just a little "snappy" for me. Since I reload .45 and 9mm, I thought I could get more use out of the gun by switching to the 9mm. I shot it today and I think I will need a 9mm mag 'cause about 3times the next round to be chambered would stove pipe bullet up because the mag feed lips are wider at the front than the 9mm round. The base of the round was held tightly, but the nose popped up. The accuracy was just fine for a combat pistol.
Try it you may like it.
Not a stupid question at all, but no you don't need a new slide. Extractor worked great and my loads cycled the slide just fine.
Assault Manager
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question
Did you say the M&P 40 was a little too snappy for you? The reason I ask is I've been shooting a Glock 40 and am not happy with the "snappy" and I've been told the the SW MP 40 is a whole lot smoother. What do you think?
Did you say the M&P 40 was a little too snappy for you? The reason I ask is I've been shooting a Glock 40 and am not happy with the "snappy" and I've been told the the SW MP 40 is a whole lot smoother. What do you think?
Jim Watson
Member
Quote:
I don't understand the present fad of buying big and shooting small.
Try it you may like it.
I'm a handloader and can make my .45 what I want it to. Including kinder and gentler shooting.
I don't understand the present fad of buying big and shooting small.
Try it you may like it.
I'm a handloader and can make my .45 what I want it to. Including kinder and gentler shooting.
austinco2
Member
The slide would have to be changed if he was going from the 9mm up to the .40. Because the nine has a smaller opening on the slide and is more prone to jam. However, going down he does not need to because .40 slide has a bigger opening. anyone feel free to correct me if I am wrong.
HNP45acp
Member
Just the Q&As I've been looking for
Great that you posted this question. I‘ve been looking for this information for a while and the most I ‘be been able to get is educated guesses. I’m thinking of getting an M&P 40 and get a 9mm barrel for when I run out of reloads or find really cheap 40s. But I’m hoping to save on magazines. 5-6 mags would cost me an additional $200 ( = 2 cases of cheap 9mm ammo).
When your rounds FTF because of the magazine lips, did you try to tighten them a little closer? Perhaps just a little so the 9mm feeds reliably, but not so much that the 40s would then dive onto the bottom of feeding ramp.
Please let me know if you tried tinkering with the magazines at all.
Thanks!
Great that you posted this question. I‘ve been looking for this information for a while and the most I ‘be been able to get is educated guesses. I’m thinking of getting an M&P 40 and get a 9mm barrel for when I run out of reloads or find really cheap 40s. But I’m hoping to save on magazines. 5-6 mags would cost me an additional $200 ( = 2 cases of cheap 9mm ammo).
When your rounds FTF because of the magazine lips, did you try to tighten them a little closer? Perhaps just a little so the 9mm feeds reliably, but not so much that the 40s would then dive onto the bottom of feeding ramp.
Please let me know if you tried tinkering with the magazines at all.
Thanks!
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