Magnum Caliber SMG? - Page 2

dakota.potts · February 20, 2016, 12:12 AM

The closest I can think of would be a full auto AR with a short barrel chambered in .50 Beowulf or .458 SOCOM or something similar. I don't see rimmed rounds working well in a full auto for the reasons stated, unless maybe a belt feed.

There is also the 10mm, as stated. Magnum level cartridges out of a rifle length barrel often equate to intermediate rifle power ballistics or just shy, so it seems like what you're asking is more defined by how a cartridge is generally used than its actual capabilities.

James K · February 20, 2016, 12:22 AM

Does anyone really believe there is any police or military interest in any new SMG, let alone the kind discussed here? Pure vaporware.

Jim

stonewall50 · February 21, 2016, 02:18 PM

Quote:

Originally Posted by James K

Does anyone really believe there is any police or military interest in any new SMG, let alone the kind discussed here? Pure vaporware.

Jim

No real need doesn't mean no real desire. Realistically an SMG is a dying breed with rifles in similar sizes now. The only real question with firearms is why not? Just like with science.

James K · February 22, 2016, 12:42 PM

SMGs are simple and easy to produce because they are blowback. Blowback works OK with cartridges in the 9mm/.45 class, but with a .454 or a .44 Magnum, the bolt would have to weigh something like 10 pounds or the gun would have to have a locked breech. The former negates the small and light advantages of a sub gun, and the latter cancels the simple and cheap aspects.

Things may change, but with the availability of light carbines based on the AR-15 there would not seem to be any role for traditional SMG's in military or police use. If full rifle power is not needed, the 9mm carbines are available.

Jim

stonewall50 · February 24, 2016, 09:51 AM

Quote:

Originally Posted by James K

SMGs are simple and easy to produce because they are blowback. Blowback works OK with cartridges in the 9mm/.45 class, but with a .454 or a .44 Magnum, the bolt would have to weigh something like 10 pounds or the gun would have to have a locked breech. The former negates the small and light advantages of a sub gun, and the latter cancels the simple and cheap aspects.

Things may change, but with the availability of light carbines based on the AR-15 there would not seem to be any role for traditional SMG's in military or police use. If full rifle power is not needed, the 9mm carbines are available.

Jim

9mm carbines over SMGs? I understand why the magnum wouldn't really exist. But why go with a carbine in a pistol caliber? Accuracy?

February 20, 2016, 12:12 AM	#26
dakota.potts Senior Member Join Date: February 25, 2013 Location: Keystone Heights, Florida Posts: 3,084	The closest I can think of would be a full auto AR with a short barrel chambered in .50 Beowulf or .458 SOCOM or something similar. I don't see rimmed rounds working well in a full auto for the reasons stated, unless maybe a belt feed. There is also the 10mm, as stated. Magnum level cartridges out of a rifle length barrel often equate to intermediate rifle power ballistics or just shy, so it seems like what you're asking is more defined by how a cartridge is generally used than its actual capabilities. __________________ Certified Gunsmith (On Hiatus) Certified Armorer - H&K and Glock Among Others You can find my writings at my website, pottsprecision.com.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

February 20, 2016, 12:22 AM	#27
James K Member In Memoriam Join Date: March 17, 1999 Posts: 24,383	Does anyone really believe there is any police or military interest in any new SMG, let alone the kind discussed here? Pure vaporware. Jim

February 22, 2016, 12:42 PM	#29
James K Member In Memoriam Join Date: March 17, 1999 Posts: 24,383	SMGs are simple and easy to produce because they are blowback. Blowback works OK with cartridges in the 9mm/.45 class, but with a .454 or a .44 Magnum, the bolt would have to weigh something like 10 pounds or the gun would have to have a locked breech. The former negates the small and light advantages of a sub gun, and the latter cancels the simple and cheap aspects. Things may change, but with the availability of light carbines based on the AR-15 there would not seem to be any role for traditional SMG's in military or police use. If full rifle power is not needed, the 9mm carbines are available. Jim