Author
Message
txsgar15a2
Online
Posts: 772
Feedback: 0% (0)
Posted: 12/1/2012 9:03:37 PM
Aside from the barrel, what must be changed to convert an AR15 chambered for 556 MM to .300 Blackout?
iNeXile556
Deo vindice
Military
Offline
Posts: 2995
Feedback: 100% (22)
Link To This Post
Posted: 12/1/2012 9:05:09 PM
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.
StealthyBlagga
Offline
Posts: 8091
Feedback: 100% (29)
Link To This Post
Posted: 12/1/2012 9:12:35 PM
...and most of your .223 upper the first time a .300BO round sneaks in amongst your .223 ammo
txsgar15a2
Online
Posts: 773
Feedback: 0% (0)
Link To This Post
Posted: 12/1/2012 9:50:05 PM
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?
WVHunter1s1k
Offline
Posts: 742
Feedback: 0% (0)
Link To This Post
Posted: 12/1/2012 9:57:26 PM
[Last Edit: 12/1/2012 9:59:30 PM 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.
Star_Scream
Radio Personality
Offline
Posts: 15899
Feedback: 100% (3)
Link To This Post
Posted: 12/1/2012 10:12:20 PM
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
6mmAR15
Offline
Posts: 1996
Feedback: 100% (1)
Link To This Post
Posted: 12/1/2012 10:14:52 PM
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.................

makintrax73
Member
Offline
Posts: 1946
Feedback: 0% (0)
Link To This Post
Posted: 12/1/2012 10:20:51 PM
The flash hider is different also, don't forget to order one if it doesn't come with your bbl.
WVHunter1s1k
Offline
Posts: 743
Feedback: 0% (0)
Link To This Post
Posted: 12/1/2012 11:02:55 PM
[Last Edit: 12/1/2012 11:06:23 PM 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.