Noveske barrel threads on CHF/Chrome Lined barrels?

[Unobtanium]

Do I need to use the spacer provided by Surefire to mount a Surefire suppressor mount? Is the shoulder a true 90* without a thread-relief cut and can you get away with not using the spacer? This is for their FN-made cold hammer forged barrels. I don't know if they thread them in-house or not.

I notice that MSTN uses the spacer on the CHF barrel that Noveske sources to them, FWIW. Is this needed, or do they just use it because it's there?

[JasonM]

Do I need to use the spacer provided by Surefire to mount a Surefire suppressor mount? Is the shoulder a true 90* without a thread-relief cut and can you get away with not using the spacer? This is for their FN-made cold hammer forged barrels. I don't know if they thread them in-house or not.

I notice that MSTN uses the spacer on the CHF barrel that Noveske sources to them, FWIW. Is this needed, or do they just use it because it's there?

Surefire wants you to use the spacer, I'd use the spacer.

[Unobtanium]

Do I need to use the spacer provided by Surefire to mount a Surefire suppressor mount? Is the shoulder a true 90* without a thread-relief cut and can you get away with not using the spacer? This is for their FN-made cold hammer forged barrels. I don't know if they thread them in-house or not.

I notice that MSTN uses the spacer on the CHF barrel that Noveske sources to them, FWIW. Is this needed, or do they just use it because it's there?

Surefire wants you to use the spacer, I'd use the spacer.

Surefire has said that if there is no radius to the barrel shoulder (totally flat, 90*), and there is no thread relief, and the back of the mount is roughly the same size as the barrel so that it pins the spacers against the barrel instead of bending them around it like on a thinner barrel when it is tq'ed down, that the spacer is superfluous. I have 3 already assembled uppers with Noveske CHF barrels and do not know if they were threaded in this way or not because they are already equipped with muzzle devices. I am trying to determine if they need work, or not.

I sent pictures of several Noveske CHF barrels to Garin Lee of Surefire that I found on Rainier Arms website, and some he said needed the spacer, and some he said did not, so I don't know which one I personally have, or if Noveske does the threads themselves of if FN does, or if Noveske threads their CHF barrels differently, or changed recently how they do it, or what. I have a 12.5, 10.5, and 14.5".

[JasonM]

Do I need to use the spacer provided by Surefire to mount a Surefire suppressor mount? Is the shoulder a true 90* without a thread-relief cut and can you get away with not using the spacer? This is for their FN-made cold hammer forged barrels. I don't know if they thread them in-house or not.

I notice that MSTN uses the spacer on the CHF barrel that Noveske sources to them, FWIW. Is this needed, or do they just use it because it's there?

Surefire wants you to use the spacer, I'd use the spacer.

Surefire has said that if there is no radius to the barrel shoulder (totally flat, 90*), and there is no thread relief, and the back of the mount is roughly the same size as the barrel so that it pins the spacers against the barrel instead of bending them around it like on a thinner barrel when it is tq'ed down, that the spacer is superfluous. I have 3 already assembled uppers with Noveske CHF barrels and do not know if they were threaded in this way or not because they are already equipped with muzzle devices. I am trying to determine if they need work, or not.

I sent pictures of several Noveske CHF barrels to Garin Lee of Surefire that I found on Rainier Arms website, and some he said needed the spacer, and some he said did not, so I don't know which one I personally have, or if Noveske does the threads themselves of if FN does, or if Noveske threads their CHF barrels differently, or changed recently how they do it, or what. I have a 12.5, 10.5, and 14.5".

It's really hard to tell about specific barrels unless you take off the muzzle devices and look at you r particular shoulder(s).

[Unobtanium]

I understand. I am curious how Noveske is threading the current CHF barrels. I don't want to tear apart a new upper and don't have the tools to correctly do it myself. I wonder if ToddK could shed light on it.

[.300WinMag]

I used the spacers b/c I had them. That said, if you torque down the MD how does it index?



Good luck

[Unobtanium]

I used the spacers b/c I had them. That said, if you torque down the MD how does it index?



Good luck

All of the muzzle devices are already installed without the use of spacers, just shims. I just want to be sure that the way Noveske threads their CHF barrel (if it is threaded in-house?), that this is right. Garin Lee of Surefire saw my 4MOA shift and a picture of the mount installed and commented on the lack of spacer, is the reason for this concern.

[.300WinMag]

What are you calling shims vs spacers?

In my book the shims from SF of varying thickness with a color code and the little index wheel instructions are spacers.

Mine is a straight shooter with MANY hits from 500 - 1,000


Good luck

[Unobtanium]

What are you calling shims vs spacers?

In my book the shims from SF of varying thickness with a color code and the little index wheel instructions are spacers.

Mine is a straight shooter with MANY hits from 500 - 1,000


Good luck

Shims are for indexing. the spacer is color coded orange and has a beveled inner diameter and is almost as thick as a nickel and to get the shims off of the barrel threads radius.

I spoke with Todd of Noveske and Garin Lee of surefire who spoke to Barry Dueck. All is well with my setup given Noveske's thread specs per Mr. Dueck.

[.300WinMag]

Interesting I have 3 SF MDs and have never seen a spacer.




Good luck

[JasonM]

I spoke with Todd of Noveske and Garin Lee of surefire who spoke to Barry Dueck. All is well with my setup given Noveske's thread specs per Mr. Dueck.

Good to hear