AR-15 to 6.8

[Guest big496]

can anyone tell me how i can convert my AR to 6.8 do i just need a barrel and bolt or do i need a whole new upper? where is the best place to find the parts? where could i find a used 6.8 upper?

[TGO David]

Will you want to use it as a 5.56/.223 periodically or will this be a one-time conversion? The reason I ask is because you can do this the cheap way or the slightly more expensive albeit more convenient way.

[BimmerFreak]

You can change out your barrel, bolt and mag followers, but my suggestion would be to buy a complete upper and swap back and forth.

[molonlabetn]

You can change out your barrel, bolt and mag followers, but my suggestion would be to buy a complete upper and swap back and forth.

Yep, the individual parts needed would probably be cheaper... but the complete upper will be much easier, and then you'll be able to swap calibers much easier, as noted.

[Guest big496]

ya i will want to switch back to 5.56. i am looking for a larger caliber for deer season but i love the cheap 223 also. so ya i guess i would want to swich back and forth how much more are complete uppers can i find the caliber used?

[TGO David]

Sure, people occasionally sell 6.8 SPC uppers used. I don't think it happens as often as people sell 5.56 uppers used, but it does happen. A quick glance at GunBroker.com shows that a complete upper will run you anywhere from $600'ish to over $1000 depending on manufacturer and kit.

[Smith]

Do get 6.8 specific mags. While .223 mags will work, the aluminum ones tend to bulge under the added pressure. That is why 6.8 mags are stainless. As far as uppers go, get a Cardinal Armory/Ko-Tonics upper. They are the definitive 6.8 builder. They use the 4 groove, 1:11 twist that is perfect for the 6.8.

[dralarms]

Do get 6.8 specific mags. While .223 mags will work, the aluminum ones tend to bulge under the added pressure. That is why 6.8 mags are stainless. As far as uppers go, get a Cardinal Armory/Ko-Tonics upper. They are the definitive 6.8 builder. They use the 4 groove, 1:11 twist that is perfect for the 6.8.

I got a cmmg upper mid length with a 1:10, It's a tack driver.

[Rightwinger]

+1 on the Kotonics/Cardinal Arms

Then buy the Silver State Armory ammunition, not the regular Remy 6.8 stuff.

[Guest Brian@GunDepot]

Stag Arms sells a complete 6.8 upper that just attaches directly in seconds.... if you want both caliber's at will, I would think about this direction with your purchase.

[Guest GLOCK2340]

So to switch a 5.56 m4 to 6.8 all you have to do is change the upper and maybe the mags? Nothing else?

[BimmerFreak]

Are you asking if you can drop a complete 6.8 upper on a 5.56 lower? Then YES.

You will need to run 6.8 mags, but other than that, you are good to go.

[dralarms]

So to switch a 5.56 m4 to 6.8 all you have to do is change the upper and maybe the mags? Nothing else?

That's it. Just make sure you don't get the mags mixed up.

[Smith]

They can also share the same bolt carrier, but the bolts are different. When I had mine, I just had two so i didn't have to worry about getting them mixed up.

[Guest GLOCK2340]

;)In that case....I'll be keepin an eye out for complete 6.8 upper as well!! Gotta love versatility!

[sigmtnman]

What does 6.8 ammo run?

[TGO David]

What does 6.8 ammo run?

About 2,400 feet per second.

And you can practically hear the cash register ka-ching every time you pull the trigger. About $19 for 20 rds in most places.

[sigmtnman]

Ouch. my pocket hurts just thinking about it.

[Guest big496]

ya im looking for a used 6.8 upper so i can blast some large game lol how many does can i hit before they leave the field hmmm? keep me posted if anyone finds a good use cheap 6.8 upper lol oxy moron

[LA_357SIG]

try the 6.8 forum. You have to register first to read the classifieds.

http://68forums.com/forums.php