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CORNHOLIO1
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Posted: 7/27/2009 6:13:27 AM
I am trying to find a muzzle brake for my 6.5 Grendel with no luck. The threads are hard to match. The barrel is threaded 9/16"-24. Any ideas?
Joe_Sakic
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Posted: 7/27/2009 10:56:36 AM
Originally Posted By CORNHOLIO1:
I am trying to find a muzzle brake for my 6.5 Grendel with no luck. The threads are hard to match. The barrel is threaded 9/16"-24. Any ideas?


Sabre Defence - scroll down...it's the Tactical Gill-Brake (3rd item from the top).

Cheers,

Sakic #19

RedFalconBill
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Posted: 7/27/2009 12:07:52 PM
Originally Posted By CORNHOLIO1:
I am trying to find a muzzle brake for my 6.5 Grendel with no luck. The threads are hard to match. The barrel is threaded 9/16"-24. Any ideas?


Gill Brake
PWS
AAC
Vltor
A-2
Gemtech
scarffstone
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Posted: 7/27/2009 6:09:31 PM
[Last Edit: 7/27/2009 6:10:32 PM by scarffstone]
Originally Posted By RedFalconBill:
Originally Posted By CORNHOLIO1:
I am trying to find a muzzle brake for my 6.5 Grendel with no luck. The threads are hard to match. The barrel is threaded 9/16"-24. Any ideas?


Gill Brake
PWS
AAC
Vltor
A-2
Gemtech


Yep, all of those offer some with the 9/16"x24 thread.

Here's a Smith Vortex with those thread count

Smith Vortex 9/16"x24 tpi
CORNHOLIO1
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Posted: 7/27/2009 6:46:18 PM
Thanks everyone. My buddy found a guy that can "open" up a standard flash hider to the new diameter and changed the threads. Its more economical this way.
Grendelizor
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Posted: 7/28/2009 5:23:26 AM
This is actually one of the reasons the 9/16s size was chosen.

John

| 6.5 Grendel: The Tier One AR Cartridge. |

www.65grendel.com
bushflyr
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Posted: 7/28/2009 1:01:09 PM
It seem really dumb that AA would choose 9/16x24 for their thread pitch when nearly every .308 and 6.8 muzzle device is already threaded 5/8x24. I'm actually strongly considering cutting and rethreading my AA barrel to rectify this tardery.
Grendelizor
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Posted: 7/28/2009 1:16:38 PM
It allows you to use standard-sized 5.56 devices, which are less "clunky" than using .308 devices. Sure, that's purely aesthetic, but there it is. Of more importance, is that using 5.56-sized devices allows COTS applications with blank-firing adaptors, etc.

All things considered, 9/16-24 was the wisest choice.

John

| 6.5 Grendel: The Tier One AR Cartridge. |

www.65grendel.com
CORNHOLIO1
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Posted: 7/28/2009 1:33:50 PM
Originally Posted By bushflyr:
It seem really dumb that AA would choose 9/16x24 for their thread pitch when nearly every .308 and 6.8 muzzle device is already threaded 5/8x24. I'm actually strongly considering cutting and rethreading my AA barrel to rectify this tardery.




My buddy says this place will do the opening and rethreading for $10. Thats not too bad. All the brakes made in that factory thread are around $90 or more. I wanted to use a highly regarded $30 brake. All in all the brake will cost me $40+ ship both ways.
bushflyr
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Posted: 7/28/2009 2:22:02 PM
Who is doing that for you?
CORNHOLIO1
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Posted: 7/28/2009 2:23:17 PM
Originally Posted By bushflyr:
Who is doing that for you?


PM sent
RedFalconBill
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Posted: 7/28/2009 3:56:10 PM
Originally Posted By bushflyr:
It seem really dumb that AA would choose 9/16x24 for their thread pitch when nearly every .308 and 6.8 muzzle device is already threaded 5/8x24. I'm actually strongly considering cutting and rethreading my AA barrel to rectify this tardery.


Ah, AA used the off the shelf FAL thread pattern.

5/8x24 is the threading for the Armalite AR-10 5/8x24, also off the shelf.

Regardless, both are common to get.
bushflyr
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Posted: 7/28/2009 4:44:44 PM
Except that all my FAL's are LH threads.

I really wanted a PWS FSC30, but just ordered a Vortex from Brownells instead. So, thoughts of chopping the barrel are currently on hold.
RedFalconBill
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Posted: 7/28/2009 5:00:01 PM
Originally Posted By bushflyr:
Except that all my FAL's are LH threads.

I really wanted a PWS FSC30, but just ordered a Vortex from Brownells instead. So, thoughts of chopping the barrel are currently on hold.


Metric are LH

Inch pattern are RH
Longdayjake
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Posted: 8/2/2009 12:34:32 PM
This really annoys me about the grendel. If I want to put a supressor on it I have to cut the barrel and have it rethreaded.
RedFalconBill
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Posted: 8/3/2009 7:43:33 PM
[Last Edit: 8/3/2009 7:54:42 PM by RedFalconBill]
Originally Posted By Longdayjake:
This really annoys me about the grendel. If I want to put a supressor on it I have to cut the barrel and have it rethreaded.


Why?

YHM, AAC, and Gemtech all make muzzle attachments that accept suppressors in 9/16 x24 RH.
mr50mag
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Posted: 8/3/2009 7:54:06 PM

I just cut mine down for new threads. I was easier to fine used muzzle devices on the EE with that thread pitch.t