11.5" 300BLK barrel?

Discussion about rifles in 300 AAC BLACKOUT (7.62x35mm), hosted by the creator of the cartridge.

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kdcgrohl
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11.5" 300BLK barrel?

Post by kdcgrohl » Tue Jul 05, 2011 9:07 am

Is there any source for a quality 300 Blackout barrel in 11.5"?
Would it be worth it to wait for the AAC barrel and chop it?
The reason for the specific size is I want the shortest possible OAL with a Knight's midlength URXII. :wink:
Thanks.

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knoxville
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Re: 11.5" 300BLK barrel?

Post by knoxville » Tue Jul 05, 2011 9:12 am

Call Aaron at Delta Company Arms! He will get you taken care of on a barrel specific to your needs and aplication. You should also save some cost instead of cutting an re-threading the AAC.

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Re: 11.5" 300BLK barrel?

Post by JasonAAC » Tue Jul 05, 2011 9:15 am

I would have one made rather than chop the AAC.

First, the finish is amazingly hard and will be very tough on tooling. Second, Roberts done a ton of work and testing to tune the gasport size to the particular barrel length(s)
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Re: 11.5" 300BLK barrel?

Post by JasonAAC » Tue Jul 05, 2011 9:16 am

a 12.5 with mid-length URX will look like the fourth one from the bottom:
Image
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kdcgrohl
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Re: 11.5" 300BLK barrel?

Post by kdcgrohl » Tue Jul 05, 2011 12:22 pm

JasonAAC wrote:I would have one made rather than chop the AAC.

First, the finish is amazingly hard and will be very tough on tooling. Second, Roberts done a ton of work and testing to tune the gasport size to the particular barrel length(s)

Pardon my ignorance, as I'm new to this caliber... But would 1" taken from a 12.5" barrel have an effect on the gas port sizing?

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300Blk
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Re: 11.5" 300BLK barrel?

Post by 300Blk » Tue Jul 05, 2011 12:38 pm

Yes, shorter barrels need larger gas ports.

But the difference would be small, and you would not necessarily need to change it or notice any difference.

This is not due to this caliber - the same applies to 5.56mm.

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Re: 11.5" 300BLK barrel?

Post by JasonAAC » Tue Jul 05, 2011 12:44 pm

silencertalk wrote:Yes, shorter barrels need larger gas ports.

But the difference would be small, and you would not necessarily need to change it or notice any difference.

This is not due to this caliber - the same applies to 5.56mm.
And the AAC ports are sized to run all combos of supersonic/subsonic/suppressed/unsuppressed so it's not necessarily a problem, just something to keep in mind.
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kdcgrohl
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Re: 11.5" 300BLK barrel?

Post by kdcgrohl » Tue Jul 05, 2011 2:07 pm

silencertalk wrote:Yes, shorter barrels need larger gas ports.

But the difference would be small, and you would not necessarily need to change it or notice any difference.

This is not due to this caliber - the same applies to 5.56mm.
That's what I was thinking. The only barrel cutting I've had experience with has been 16" -> 14.5" in 5.56. No port adjusting was necessary.

Thank you guys for the replies. Any updates on the AAC barrels?

Any other thoughts?

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kdcgrohl
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Re: 11.5" 300BLK barrel?

Post by kdcgrohl » Tue Jul 05, 2011 2:11 pm

knoxville wrote:Call Aaron at Delta Company Arms! He will get you taken care of on a barrel specific to your needs and aplication. You should also save some cost instead of cutting an re-threading the AAC.
Are these SS barrels?

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Re: 11.5" 300BLK barrel?

Post by LYNRDSKYNRD » Tue Jul 05, 2011 2:23 pm

kdcgrohl wrote:Any other thoughts?
Call Aaron at Delta Company Arms! He will get you taken care of on a barrel specific to your needs and aplication. You should also save some cost instead of cutting an re-threading the AAC.
+1
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