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Basic
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Posted: 10/7/2013 4:21:38 AM EST
Does anyone know where I might find a 20" 300 blackout barrel? I want to build a 300 blackout and would love a 20" heavy barrel fluted. Thanks

.300 Blackout For The Win
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Link Posted: 10/7/2013 4:23:30 AM EST
[Last Edit: 10/7/2013 4:24:00 AM EST by garyd]
At best you are looking at a custom job. You really do not gain a whole lot after 16 inches. There may be someone making a non custom 300 blk heavy fluted, but I have not seen it.
C co 2/325th AIR 91-96 11B1P
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Link Posted: 10/7/2013 4:54:13 AM EST
Last night on Brownells I saw where you could order 24" AR barrels in a variety of calibers. It's not fluted or anything, more likely closer to a standard barrel. If 24" is too much for your fancy then so be it, but I know I will be ordering one.

Here's the link:

http://www.brownells.com/rifle-parts/barrel-parts/rifle-barrels/24-223-rem-med-rifle-gas-barrel-sku080001018-56797-112677.aspx

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Link Posted: 10/7/2013 5:05:52 AM EST
There's almost zero advantage to a 20" barrel. A few FPS faster isn't worth the extra weight, IMHO. Also, 20" isn't going to give you any better accuracy than 16". The fast-burning pwoders used in the 300 BLK are done well before the 16" mark. I love my 300s, and I'm always tempted to try to make them something they're not. As Nancy Reagan used to say, "Just say, no."

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Link Posted: 10/7/2013 5:09:59 AM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Warmachine_10:
Last night on Brownells I saw where you could order 24" AR barrels in a variety of calibers. It's not fluted or anything, more likely closer to a standard barrel. If 24" is too much for your fancy then so be it, but I know I will be ordering one.

Here's the link:

http://www.brownells.com/rifle-parts/barrel-parts/rifle-barrels/24-223-rem-med-rifle-gas-barrel-sku080001018-56797-112677.aspx
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I don't see a 300 BLK barrel longer than 16" there.
The meaning of peace is the absence of opposition to socialism.
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Link Posted: 10/7/2013 5:13:27 AM EST
No advantage will be seen out of a 20" barrel...powder burns in the first 9".
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Link Posted: 10/7/2013 5:24:16 AM EST
Exactly what they said, powder burns up in 9" and after 16" you get drag. I've got 8.5 and a brake and can hit anything you can with a 20" heavy 5.56 (practice required). Like the short, it'll like you back long time.
More fun than fishing in a barrel with a frag since 1987.
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Link Posted: 10/7/2013 4:16:52 PM EST
If you want a 20" barrel I'd look at the 30hrt if you are thinking a custom handload only thing is up your alley. There was one company that was making 20" 300blk barrels....I thought it was Houston Armory, but I didn't see them on their website. The company that makes them used to chime in on these 20" barrel threads to counter all the 300 blk 20" naysayers. IIRC the numbers they were posting seemed like it would be a worth while thing to do for the few who wanted to go that route. I don't recall any posts in the recent past, though. If I figure out who it was I'll post it. YMMV

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