ECC brake timing off the crown? What?

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[ARCHIVED THREAD] - ECC brake timing off the crown? What?

ChandlerKJ

Member

Joined Dec 2008
Posts 2089
EE Offline

WA, USA

Posted: 8/23/2017 12:44:42 PM EST

[Last Edit: 8/23/2017 2:08:16 PM EST by ChandlerKJ]

I have my ECC at the gunsmith. A local guy I trust a lot. Very reputable but he might be dead wrong here and I'd like to know before he alters my factory barrel. I gave him an AAC brake to install so I can run my 762SDN-6. He called me and said that he has to cut and re-crown my barrel because KAC times the brake off of the crown. What is he talking about? Tell him to stop?

EDIT: He didn't 'cut' the barrel. He wants to take a couple thousandths off to time it correctly rather than stacking a bunch of shims.

EDIT 2: Well, he took those thousandths off. re-crowned with the 11° crown. Just awesome

I don't know what to say....

I may now send it to KAC to unfuck it. Wow, and this is ahead of my rifle shoot in TX!!! FUCK

KLamper Joined May 2016 Posts 2152 EE Offline AZ, USA	Posted: 8/23/2017 1:53:05 PM EST I’d use shims, wouldn’t want my barrel touched.

Combat_Jack Ultimus Romanorum Joined Dec 2001 Posts 89885 EE Offline USA	Posted: 8/23/2017 2:03:40 PM EST KAC 7.62 threads don't have a shoulder. They time against the crown which is large. Use the shims that's what they are there for.
	"By the metrics of environmentalism, poverty vastly outperforms wealth." -Andres Duany.

KAC_Sales Member Joined Mar 2017 Posts 40 EE Offline FL, USA	Posted: 8/23/2017 3:42:45 PM EST Give me a call here at the office. I'm here till 5PM
	Adam Pini Commercial Sales Manager Knight's Armament Company 701 Columbia Blvd. Titusville, Fl 32780 321-607-9900 apini@knightarmco.com www.knightarmco.com

ChandlerKJ Member Joined Dec 2008 Posts 2093 EE Offline WA, USA	Posted: 8/23/2017 4:46:03 PM EST Quote History Originally Posted By KAC_Sales: Give me a call here at the office. I'm here till 5PM View Quote Just missed you sir. I'll call in the AM.

five7guy Member Joined Aug 2015 Posts 1049 EE Offline AZ, USA	Posted: 8/23/2017 6:48:16 PM EST ON the SR25's they do time the muzzle devices off the crown because the barrel has virtually no shoulder I was really bewildered the first time I pulled off a QDC flash hider to install a MAMS. I'm curious to see how this turns out keep us posted and best of luck brother I know the sickening feeling when someone goofs something up
	Our Constitution was made only for a moral and religious people. It is wholly inadequate to the government of any other. -John Adams

FRBaseball Member Joined Feb 2007 Posts 1514 EE Offline NV, USA	Posted: 8/23/2017 8:24:45 PM EST I could be wrong, but I was under the impression that AAC made several versions of their 7.62 brake, including one specifically for KAC rifles. He shouldn't need to cut anything. Also, can a gunsmith re-crown a chrome-lined barrel without screwing up the lining?

ChandlerKJ

Member

Joined Dec 2008
Posts 2094
EE Offline

WA, USA

Posted: 8/23/2017 8:52:06 PM EST

Quote History

Originally Posted By FRBaseball:
I could be wrong, but I was under the impression that AAC made several versions of their 7.62 brake, including one specifically for KAC rifles. He shouldn't need to cut anything.

Also, can a gunsmith re-crown a chrome-lined barrel without screwing up the lining?

View Quote

This was the SR25 specific AAC brake.

This guy is pretty well known up here. Especially for his custom 700 builds. I may send it back to KAC to fix anything that is fucked. Like flaking CL or something.

Jack_L Member Joined Oct 2012 Posts 747 EE Offline FL, USA	Posted: 8/24/2017 8:18:33 AM EST I'd be furious.
	Jack Leuba Military/Government Sales Manager Knight's Armament Company

ChandlerKJ Member Joined Dec 2008 Posts 2095 EE Offline WA, USA	Posted: 8/24/2017 9:40:54 AM EST [Last Edit: 8/24/2017 9:43:25 AM EST by ChandlerKJ] Quote History Originally Posted By Jack_L: I'd be furious. View Quote Yeah... more like sick to my stomach. I paid $5k for this rifle. Can you guys fix? To top it off, when I picked it up my bipod was on backwards.....

Jack_L

Member

Joined Oct 2012
Posts 748
EE Offline

FL, USA

Posted: 8/24/2017 10:48:05 AM EST

Quote History

Originally Posted By ChandlerKJ:

Yeah... more like sick to my stomach. I paid $5k for this rifle. Can you guys fix?

To top it off, when I picked it up my bipod was on backwards.....

View Quote

We can "fix" anything, but that "fix" might be a replacement.
He might be great at recrowning barrels, but my worry is how much he removed from the muzzle face, which might make it shorter than 16", and the integrity of the bore chrome.
He might get hit with a pretty decent bill from us for repair.
Naturally, if it's just putting the muzzle device on correctly, it won't be bad.

Jack Leuba
Military/Government Sales Manager
Knight's Armament Company

ChandlerKJ

Member

Joined Dec 2008
Posts 2097
EE Offline

WA, USA

Posted: 8/24/2017 2:27:42 PM EST

[Last Edit: 8/24/2017 2:28:10 PM EST by ChandlerKJ]

Quote History

Originally Posted By Jack_L:

We can "fix" anything, but that "fix" might be a replacement.
He might be great at recrowning barrels, but my worry is how much he removed from the muzzle face, which might make it shorter than 16", and the integrity of the bore chrome.
He might get hit with a pretty decent bill from us for repair.
Naturally, if it's just putting the muzzle device on correctly, it won't be bad.

View Quote

I will be shipping the rifle back to KAC for evaluation. Just need it back before November

Gatorvet Joined May 2014 Posts 640 EE Offline FL, USA	Posted: 8/24/2017 2:46:50 PM EST What did the smith say about this? Did he bill you even though you did not request or authorize the modification?

ChandlerKJ

Member

Joined Dec 2008
Posts 2098
EE Offline

WA, USA

Posted: 8/24/2017 4:17:17 PM EST

Quote History

Originally Posted By Gatorvet:
What did the smith say about this?
Did he bill you even though you did not request or authorize the modification?

View Quote

He said he never noticed the shims that were included and did this the way he does his bolt guns. Which is partly correct. Just not correct at all on KAC rifles. He is overly apologetic and has agreed to make it right even if that means KAC puts a new barrel in it. He said he will cover what needs to be covered. There is a chance all is well according to KAC. I am going to ship the rifle in so we all know for sure. If the barrel needs to be replaced for whatever reason than he will cover it. We may not need to go that route. I was pretty upset. KAC on the phone did great to console me and tell me everything was going to be alright and even offered to sing me a lullaby while I cried myself to sleep. Now THAT is customer service!

Gatorvet Joined May 2014 Posts 641 EE Offline FL, USA	Posted: 8/24/2017 8:26:34 PM EST Cool. Thanks for sharing. Hoping for a quick and painless resolution for you...

ChandlerKJ Member Joined Dec 2008 Posts 2107 EE Offline WA, USA	Posted: 8/28/2017 8:53:37 PM EST Adam, I shipped the rifle back, attn you, to KAC. Just an FYI.

[ARCHIVED THREAD] - ECC brake timing off the crown? What?

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