Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel

Log In

A valid email is required.
Password is required.
Site Notices
Basic
  • Member
  • Jun 2003
  • USA TX, USA
Basic
  • Member
  • Jun 2003
  • USA TX, USA
  • Posts: 772
  • Feedback: 0% (0)
  • Status: Offline
Posted: 12/1/2012 4:03:37 PM EST
Aside from the barrel, what must be changed to convert an AR15 chambered for 556 MM to .300 Blackout?
Deo vindice
Avatar
Bronze
  • Team Member
  • Jan 2009
  • USA TN, USA
Bronze
  • Team Member
  • Jan 2009
  • USA TN, USA
Military
  • Posts: 2995
  • Feedback: 100% (40)
  • Status: Offline
  • Link To Post: Click
Posted: 12/1/2012 4:05:09 PM EST
Only the barrel.
The world is a dangerous place to live; not because of the people who are evil,
but because of the people who don't do anything about it.

Rise And Rise Again Until Lambs Become Lions.
Basic
  • Member
  • Feb 2002
  • USA AZ, USA
Basic
  • Member
  • Feb 2002
  • USA AZ, USA
  • Posts: 8091
  • Feedback: 100% (35)
  • Status: Offline
  • Link To Post: Click
Posted: 12/1/2012 4:12:35 PM EST
...and most of your .223 upper the first time a .300BO round sneaks in amongst your .223 ammo
Basic
  • Member
  • Jun 2003
  • USA TX, USA
Basic
  • Member
  • Jun 2003
  • USA TX, USA
  • Posts: 773
  • Feedback: 0% (0)
  • Status: Offline
  • Link To Post: Click
Posted: 12/1/2012 4:50:05 PM EST
I read the thread about something similar a few weeks ago somewhere on AR15.COM. So the barrel is the only thing. I am assuming that the case is the same dimensions in the backend as the 5.56 or .223. That is good to know. Does anyone know where I can find .300 Black Out barrels?
Basic
  • Member
  • Sep 2011
  • USA WV, USA
Basic
  • Member
  • Sep 2011
  • USA WV, USA
  • Posts: 742
  • Feedback: 0% (0)
  • Status: Offline
  • Link To Post: Click
Posted: 12/1/2012 4:57:26 PM EST
[Last Edit: 12/1/2012 4:59:30 PM EST by WVHunter1s1k]
Originally Posted By txsgar15a2:
I read the thread about something similar a few weeks ago somewhere on AR15.COM. So the barrel is the only thing. I am assuming that the case is the same dimensions in the backend as the 5.56 or .223. That is good to know. Does anyone know where I can find .300 Black Out barrels?

Not, sure what you mean by 'backend'? The .300 has a shorter case. It is shorten at the neck & shoulder, if that is what you mean.
Radio Personality
Avatar
Gold
  • Team Member
  • May 2005
  • ETH ETH
Gold
  • Team Member
  • May 2005
  • ETH ETH
  • Posts: 15899
  • Feedback: 100% (3)
  • Status: Online
  • Link To Post: Click
Posted: 12/1/2012 5:12:20 PM EST
Originally Posted By txsgar15a2:
I read the thread about something similar a few weeks ago somewhere on AR15.COM. So the barrel is the only thing. I am assuming that the case is the same dimensions in the backend as the 5.56 or .223. That is good to know. Does anyone know where I can find .300 Black Out barrels?


The 300BLK case is derived from the 556.

I make my 300blk brass from 556 brass
Valar Morghulis
Basic
  • Member
  • Sep 2007
  • USA VA, USA
Basic
  • Member
  • Sep 2007
  • USA VA, USA
  • Posts: 1996
  • Feedback: 100% (2)
  • Status: Offline
  • Link To Post: Click
Posted: 12/1/2012 5:14:52 PM EST
Originally Posted By txsgar15a2:
I read the thread about something similar a few weeks ago somewhere on AR15.COM. So the barrel is the only thing. I am assuming that the case is the same dimensions in the backend as the 5.56 or .223. That is good to know. Does anyone know where I can find .300 Black Out barrels?


For low cost and high quality........give SOTA arms a call.......I purchased one of their barrels.......phosphated 16 inch Black out barrels and have been pleased.........I think I paid 129.00 plus 12.00 shipping......more than reasonable and have had a lot of fun trying different reloads.........

Killed my first Deer today with this barrel.........125 Nosler ballistic tip.......got the job done.................

Member
Avatar
Bronze
  • Team Member
  • Mar 2009
  • USA IL, USA
Bronze
  • Team Member
  • Mar 2009
  • USA IL, USA
  • Posts: 1946
  • Feedback: 0% (0)
  • Status: Offline
  • Link To Post: Click
Posted: 12/1/2012 5:20:51 PM EST
The flash hider is different also, don't forget to order one if it doesn't come with your bbl.
Basic
  • Member
  • Sep 2011
  • USA WV, USA
Basic
  • Member
  • Sep 2011
  • USA WV, USA
  • Posts: 743
  • Feedback: 0% (0)
  • Status: Offline
  • Link To Post: Click
Posted: 12/1/2012 6:02:55 PM EST
[Last Edit: 12/1/2012 6:06:23 PM EST by WVHunter1s1k]
Originally Posted By makintrax73:
The flash hider/comp/brake whatever, the name or type you want is different also, don't forget to order one if it doesn't come with your bbl.

Good thinking! Yes, you will need to get one of them too! For a 308 dia. bullet.
Top