YAGT: 5.56 Nato -> 6.8. The new military round?

[Shockwave]

Text

Interesting. A drop in upper that changes the M series guns from 5.56 to 6.8 caliber. Seems to give more knock down power. Thoughts?

 

[WinkOsmosis]

AWESOME

 

[Shockwave]

Seems another company is also making 6.5mm Grendel uppers, again being direct drop on replacements.
I think I may look into adding a M series weapon to my collection. With the various components availbe for those plus the 2 optional calibers (6.8 and 6.5) this is (as we all know) a seriously versatile weapon!
5.56 for plinking / varmint
6.8 for muzzle to 500 yard light to medium game hunting
6.5 for long range / medium to large game hunting.

All this from 1 standard lower, Just swap your upper and go. Very nice to have so much diversity in a single platform.

 

[BuckNaked]

One problem that hasn't been addressed to my knowledge is the magazines... They developed a different magazine because the cartridge shape is slightly different than the 5.56 round, and it isn't clear if current M-16 magazines will hold more than 10-12 round of the new cartridge.

I don't suppose you got that link from Gyrene did you...?

 

[WinkOsmosis]

What do calibre numbers mean?

 

[BuckNaked]

Originally posted by: WinkOsmosis
What do calibre numbers mean?

They are generally the diameter of the bullet...

 

[TheBoyBlunder]

Does anyone else see YAGT and think "Yet another girl thread" ? Yes, that means there are some odd girl threads, but still...

 

[Shockwave]

Originally posted by: Buck_Naked
One problem that hasn't been addressed to my knowledge is the magazines... They developed a different magazine because the cartridge shape is slightly different than the 5.56 round, and it isn't clear if current M-16 magazines will hold more than 10-12 round of the new cartridge.

I don't suppose you got that link from Gyrene did you...?

Actually no I didnt get it from him. I was looking for bullpup stocks for my SKS when I came across this. And yes, I found bullpups for the SKS, and they make the gun look VERY badass and probably give it wicked quick target accuisition. But its a custom deal kind of thing....

 

[Mookow]

Originally posted by: Buck_Naked
One problem that hasn't been addressed to my knowledge is the magazines... They developed a different magazine because the cartridge shape is slightly different than the 5.56 round, and it isn't clear if current M-16 magazines will hold more than 10-12 round of the new cartridge.

I don't suppose you got that link from Gyrene did you...?

Existing 5.56 mm magazines can easily be modified to shoot both 6.8 mm and 5.56 mm, using a new follower and slight modification to the feed lips. Since the magazines can still shoot 5.56 mm, they are still BATF legal. When modified this way, a typical GI 30 rd 5.56 mm mag will take 25 or 26 rounds of 6.8 mm. FWIW, all of our initial SPC testing was done using existing 5.56 mm magazines, NOT the new 28 rd PRI 6.8 mm specific mags.

 

[etech]

ASSAULT RIFLES AND THEIR AMMUNITION

Should have been done long ago. The 5.56mm was not the best solution.

 

[burnedout]

Originally posted by: Shockwave
Text

Interesting. A drop in upper that changes the M series guns from 5.56 to 6.8 caliber. Seems to give more knock down power. Thoughts?

The thread you linked appears to have enough posters with ballistics expertise to successfully develop a thriving small arms industry of their own.

Heh, there is even a copy of an e-mail from Dr. Fackler himself.

 

[Shockwave]

Originally posted by: burnedout

Originally posted by: Shockwave
Text

Interesting. A drop in upper that changes the M series guns from 5.56 to 6.8 caliber. Seems to give more knock down power. Thoughts?

The thread you linked appears to have enough posters with ballistics expertise to successfully develop a thriving small arms industry of their own.

Heh, there is even a copy of an e-mail from Dr. Fackler himself.

:beer:

 

[WinkOsmosis]

Originally posted by: Buck_Naked

Originally posted by: WinkOsmosis
What do calibre numbers mean?

They are generally the diameter of the bullet...

So saying something is 6.8 calibre is the same as saying it's 6.8mm?

 

[yllus]

While we're asking questions, what does the term "magnum" mean? Anything other than a heavier powder load? (I was just informed of that meaning.)

 

[Shockwave]

^^
Yes and yes.

 

[Mookow]

Originally posted by: WinkOsmosis

Originally posted by: Buck_Naked

Originally posted by: WinkOsmosis
What do calibre numbers mean?

They are generally the diameter of the bullet...

So saying something is 6.8 calibre is the same as saying it's 6.8mm?

It is the internal width of the barrel, in 1/100's of an inch. Sometimes you'll see spec sheets say "Caliber: 9mm", but I've never heard someone say a firearm is chambered in "9 caliber" when they mean 9mm*. If you are giving it in mm's, you wont say "caliber".



*9 could stand in for any number

 

[Mookow]

Originally posted by: yllus
While we're asking questions, what does the term "magnum" mean? Anything other than a heavier powder load? (I was just informed of that meaning.)

Pretty much, except for shotguns, where "magnum" refers to being loaded with more shot. It usually isnt faster, just more lead.

 

[etech]

trivia,

In naval guns, at least in the US, the calibre is the length of the barrel divided by the size of the round. ie. A 3"50 calibre has a 3" shell and a barrel length of 150".

3" 50 caliber

"The term "calibre" is used to describe ammunition. It is a relationship between the diameter of the projectile and the length of the gun tube. A 3"/50 calibre gun fired a 3" diameter projectile through a rifled tube 150 inches (3x50) long. Other examples are: 5"/38 commonly found on DDs, 5"/25 on submarines, and the giant 16"/50s found on battleships. The projectiles are not interchangeable among the same calibre, i.e. a 5"/38 projectile cannot be used in a 5"/25 tube. Today, the U.S. Navy is the only service still using this naming system."

 

[FelixDeCat]

*Drool*

 

[BuckNaked]

Originally posted by: Mookow

Originally posted by: Buck_Naked
One problem that hasn't been addressed to my knowledge is the magazines... They developed a different magazine because the cartridge shape is slightly different than the 5.56 round, and it isn't clear if current M-16 magazines will hold more than 10-12 round of the new cartridge.

I don't suppose you got that link from Gyrene did you...?

Existing 5.56 mm magazines can easily be modified to shoot both 6.8 mm and 5.56 mm, using a new follower and slight modification to the feed lips. Since the magazines can still shoot 5.56 mm, they are still BATF legal. When modified this way, a typical GI 30 rd 5.56 mm mag will take 25 or 26 rounds of 6.8 mm. FWIW, all of our initial SPC testing was done using existing 5.56 mm magazines, NOT the new 28 rd PRI 6.8 mm specific mags.

The jury is still out on whether or not that will work. There are rumors of someone offering a replacement mag body in exchange for a M-16 mag body. Time will tell if just changing out the follower will allow reliable functioning with the round. All the feedback I have heard regarding the upper has been the use of the spec'ed LE/Military mags, and have heard nothing about functioning with a modified mag. If the AWB were too sunset, it would make it all moot... Write your respective politicians if you have any interest in seeing that happen...

Remington is coming out with Model 700 in this round as well... coupled with a suppressor, it would make for a nice urban tactical rifle for LE...