10mm M1 carbine conversion!!
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EdJennings
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I have no idea if this is feasible or not, but if you get it done I'd sure like to read about the result.
Wildbillz
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I don't know if it could be done. Years ago I was thinking of getting a Ruger PC40 carbine and seeing if a conversion to 10mm was possible and or practical. Now I would be concerned if it was safe to do or not. It would be fun to have one that ran on Glock 20 mags.
WB
WB
Deaf Smith
Member
I think the Ruger idea far more possible that a M1 Carbine.
But most of these carbines are blow-back designs and it might not be such a hot idea.
How about a Mini-14 10mm? Or better yet, a .45 Winchester Magnum 16 inch carbine.
Deaf
But most of these carbines are blow-back designs and it might not be such a hot idea.
How about a Mini-14 10mm? Or better yet, a .45 Winchester Magnum 16 inch carbine.
Deaf
rcmodel
Member in memoriam
Going from a .360" bolt face to a .425" bolt face with that much increased bolt thrust.
And reduced chamber wall thickness?
Doesn't seem prudent.
But what do I know.
rc
And reduced chamber wall thickness?
Doesn't seem prudent.
But what do I know.
rc
Sam Cade
Member
Tony Rumore has built at least one 10mm m1 carbine (if memory serves) so it is possible. The expense would no doubt be extreme.
Queen_of_Thunder
member
Just find a Ruger semi auto 44mag carbine.
mr.trooper
Member
That used to be the thing back in the day. OP is not the first guy to think of this - both 10mm and 10mm Auto Mag have been done in the M1 carbine. Totally possible.
Tejicano Loco
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The carbine that Tony Rumore built was in 10mm Mag and he built it to run on Desert Eagle magazines.
I have seen a number of different 10mm short rifle conversions - M1 Carbine, AR, HK UMP, Thompson, and of course the HK MP5. Usually there are made to run on greasegun magazines since those are relatively cheap and available.
I doubt the M1 Carbine magazine would work well as the 10mm case is significantly wider than the 30 Carbine round. I'm sure they would fit but they might bind too much to feed properly.
I have seen a number of different 10mm short rifle conversions - M1 Carbine, AR, HK UMP, Thompson, and of course the HK MP5. Usually there are made to run on greasegun magazines since those are relatively cheap and available.
I doubt the M1 Carbine magazine would work well as the 10mm case is significantly wider than the 30 Carbine round. I'm sure they would fit but they might bind too much to feed properly.
W L Johnson
Member
Anything is possible with enough money and time but wouldn't it just be easier to take something in 40, ie CX4, Hip-point etc.., and mod it instead? I mean with everything on an M1C that would have to modified/replaced to get it to work with 10mm in the end what would be left of the M1C? Could you even call it an M1 Carbine anymore afterwards?
flightsimmer
Member
Why not just get one of these, I have one.
http://www.mechtechsys.com/glock.php
http://www.mechtechsys.com/glock.php
SilentScream
Member
It could probably be done, for a couple rounds anyway....
Sam Cade
Member
Is LeGendre still around? I can't find him on the FFL list.
Le Mag doesn't show up in the most recent AFMER either.
http://www.atf.gov/statistics/index.html
Nope
Don357
Member
Rather than a M1 Carbine in 10mm, how about rechambering one of the old Ruger .357mag carbines to .357max. Or a carbine kit for a 1911 style Coonan or AMT in .45 Win mag or 9mm Win mag?
redneck2
Member
There was a thread about this running here just a week or two ago. Video showed two guys shooting a conversion of either a Hi Point or Kel Tech 40 S&W.
Do a Youtube search. Member here did the conversion
Do a Youtube search. Member here did the conversion
45_auto
Member
How badly do you want one? Tony Rumore of Tromix built one in 10mm Magnum (longer 10mm) a while back. If you wave enough thousand dollar bills at him (maybe 3 or 4?) he'd probably build you one in 10mm Auto.
http://www.ar15.com/archive/topic.html?b=3&f=121&t=261059
http://www.hunt101.com/showphoto.php?photo=354656&sort=7&thecat=500&password=
http://www.tromix.com/
http://www.ar15.com/archive/topic.html?b=3&f=121&t=261059
http://www.hunt101.com/showphoto.php?photo=354656&sort=7&thecat=500&password=
http://www.tromix.com/
Fast Frank
Member
Balrog said:
This.
What is the perceived advantage?
What could the 10mm carbine do that a .30 carbine could not?
verb0s
Member
It's an interesting idea, if i owned a M1 carbine and familiar with it's inner workings like any other gun i own, I'd probably know if it's doable or not. It probably is, if you don't care if it's not practical then nothing is impossible.
Maybe i'm over simplifying this, but it sounds really simple. rebarrel; new bolt head; minor feed ramp, mag and gas system adjustments.
first I would see if it's feasible.
can the new fatter cartridge fit on the bolt head?
can the gun be rebarreled?
will ammo fit in the magazine? easiest way: actually load the mag with 10mm and see if you can unloaded it without issues
is the new caliber's pressure less than or equal to the original chamber pressure?
there's really no better way than to have a m1 carbine and play around with it with a 10mm cartridge. could also look it up online. I'm a hands on guy, I'd rather do this hands on.
online data suggests they can be rebarreled, 10mm fits in mag, the pressure of 10mm is lower than 30 carbine.
so far it looks good. next step is to determine whether parts exist, then finding someone who will work with you (any gunsmith with a lathe & mill)
I'd do this myself- sounds like a fun project- if i have a non-C&R M1 carbine is don't mind 'destroying' and lathe/mill at my disposal. worst outcome is that i spend a couple hundred to learn it doesn't work.
Maybe i'm over simplifying this, but it sounds really simple. rebarrel; new bolt head; minor feed ramp, mag and gas system adjustments.
first I would see if it's feasible.
can the new fatter cartridge fit on the bolt head?
can the gun be rebarreled?
will ammo fit in the magazine? easiest way: actually load the mag with 10mm and see if you can unloaded it without issues
is the new caliber's pressure less than or equal to the original chamber pressure?
there's really no better way than to have a m1 carbine and play around with it with a 10mm cartridge. could also look it up online. I'm a hands on guy, I'd rather do this hands on.
online data suggests they can be rebarreled, 10mm fits in mag, the pressure of 10mm is lower than 30 carbine.
so far it looks good. next step is to determine whether parts exist, then finding someone who will work with you (any gunsmith with a lathe & mill)
I'd do this myself- sounds like a fun project- if i have a non-C&R M1 carbine is don't mind 'destroying' and lathe/mill at my disposal. worst outcome is that i spend a couple hundred to learn it doesn't work.
Last edited:
barnbwt
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"the pressure of 10mm is lower than 30 carbine"
The case head area of the 10mm is about 25% larger, so the load goes up by that much (the max pressures are fairly close). Now, it is extremely likely the gun was designed with at least that much margin, making the change perfectly safe. An example would be; pretty every wildcat conversion ever done
.
Nonetheless, it would be wise to proceed with caution and check for lug setback, cracks, and other issues, since you are going past the original actual loads. You are off the beaten path; proceed with caution. Since others have done this and met with success is no guarantee, but it strongly suggests that the action does indeed have sufficient extra design margin to handle a higher bolt thrust. This may wear the gun out in fewer cycles, but that point may not occur within the expected operating life of the gun, anyway (for example; it may now fatigue out at 50k rounds instead of 100k)
As I post on most all gun-modding threads here now, check out Weaponsguild, since your idea will be met with far less skepticism (none), and you will quickly get in touch with dozens of folks who would be willing to take your money for a conversion, but even more eager to show/help you to do the conversion yourself. This mod would be considered "tame" by their standards (compared to opening an AR15 boltface to accept a cut-down 300WSM case loaded with 500gr .510cal slugs at 40Ksi)
TCB
The case head area of the 10mm is about 25% larger, so the load goes up by that much (the max pressures are fairly close). Now, it is extremely likely the gun was designed with at least that much margin, making the change perfectly safe. An example would be; pretty every wildcat conversion ever done
.Nonetheless, it would be wise to proceed with caution and check for lug setback, cracks, and other issues, since you are going past the original actual loads. You are off the beaten path; proceed with caution. Since others have done this and met with success is no guarantee, but it strongly suggests that the action does indeed have sufficient extra design margin to handle a higher bolt thrust. This may wear the gun out in fewer cycles, but that point may not occur within the expected operating life of the gun, anyway (for example; it may now fatigue out at 50k rounds instead of 100k)
As I post on most all gun-modding threads here now, check out Weaponsguild, since your idea will be met with far less skepticism (none), and you will quickly get in touch with dozens of folks who would be willing to take your money for a conversion, but even more eager to show/help you to do the conversion yourself. This mod would be considered "tame" by their standards (compared to opening an AR15 boltface to accept a cut-down 300WSM case loaded with 500gr .510cal slugs at 40Ksi)
TCB
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