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Discussion Starter · #1 · (Edited)
Here it is fellas. First off I would like to thank Jeremy from Silencer Shop. He was extremely helpful in guiding me through this process and even took a phone call from me today to make sure it went smooth. I have to say he was correct when he told us all that this would work. The results are below.

I installed a Silencerco Specwar brake using a Silencerco shim kit and the items in the below picture. Please ask if you have any questions on any of the things used in this install. Basically I have a silencer co-shim kit, acetone, torque wrench, leather for the vice jaws, vice jaws, Geissele alignment rods, acetone, armorers wrench and rocksett.



Getting ready to put the shims on. I used acetone to clean the threads on the barrel as well as the threads inside of the break.



I put the first the washer on against the barrel shoulder. Then I put the first shim on. That was not enough so I added another shim until the break would turn to about 10 o'clock. I knew then I could use the torque wrench to put it to the full 12 o'clock position and have it where I needed it. I then apply the rocksett and tightened it down to 35 foot-pounds with torque and armorers wrenchs. The result was perfect.




Lastly I had to use the very expensive but extremely handy and reliable Geissele suppressor alignment rod. Did it work? You bet it did! Pictures don't lie fellas.



Here is my scar 17 and it's finished form.

 

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Right on! Nicely done, man.
 
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I have to do my scars. My 16 came off easy but the 17 is a b! I need to use the boiling water routine. I haven't installed my surefire on the 16 yet cause I needed to get a new wrench that would fit the fh. The normal wrenches are too small apparently
 

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Discussion Starter · #8 ·

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I will point out that we tried it without the large washer that SilencerCo includes and just used shims at first. It wasn't giving us the results we were looking for so we when back and tried both sides of the large washer. But if you are doing this always start with the smallest shim first and work up from there. Don't just jump to the large washer.
 

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Instead of using the barrel vise block you can simply remove the barrel and put it in the vise at the chamber end where the barrel nuts would go through. That way you do not need to worry about the barrel slipping in the vise block. JMHO

Looks good though!
 

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Discussion Starter · #14 ·
Instead of using the barrel vise block you can simply remove the barrel and put it in the vise at the chamber end where the barrel nuts would go through. That way you do not need to worry about the barrel slipping in the vise block. JMHO

Looks good though!
I was told way back on this forum that that much torque on the barrel could/ would twist it. That's why I had the vice as close to the end of the barrel as possible.
 
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I was told way back on this forum that that much torque on the barrel could/ would twist it. That's why I had the vice as close to the end of the barrel as possible.
No, and it is done all the time on AR style rifles. I don't know how much torque you use, but it shouldn't be anywhere near enough to "twist" the barrel permanently. I've forgotten the spec I think it's ~30 ftlbs. But it's not the barrel you have to worry about, its the threads you need to worry about. You could either strip them or twist the threaded end off.

Tightness also depend on whether you are using a crush washer or a peel washer to index. And then there is always Rocksett.

EDIT: Oh I see what you are worried about, the barrel extension perhaps. Hmmm! I'll have to check on that. I've not had that problem.

For an AR I use something like the Geissele reaction rod.
 

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Discussion Starter · #16 ·
No, and it is done all the time on AR style rifles. I don't know how much torque you use, but it shouldn't be anywhere near enough to "twist" the barrel permanently. I've forgotten the spec I think it's ~30 ftlbs. But it's not the barrel you have to worry about, its the threads you need to worry about. You could either strip them or twist the threaded end off.

Tightness also depend on whether you are using a crush washer or a peel washer to index. And then there is always Rocksett.

EDIT: Oh I see what you are worried about, the barrel extension perhaps. Hmmm! I'll have to check on that. I've not had that problem.
Dude I know more details about life existing elsewhere in the universe that I know about weaponry. :lol:

However I do remember vividly detailed threads on how easy it would be to twist the barrels of the scar 16 and 17. About 3 to 4 years ago it was a very hot topic because everybody was taking the factory break off. Got me extremely paranoid. That is why I took such a precaution. Besides there is a member of this forum that claims that you lose your warranty on all FN stuff for the slightest reasons. I was just trying to do it right.
 

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Dude I know more details about life existing elsewhere in the universe that I know about weaponry. :lol:

However I do remember vividly detailed threads on how easy it would be to twist the barrels of the scar 16 and 17. About 3 to 4 years ago it was a very hot topic because everybody was taking the factory break off. Got me extremely paranoid. That is why I took such a precaution. Besides there is a member of this forum that claims that you lose your warranty on all FN stuff for the slightest reasons. I was just trying to do it right.

Maybe I'm not paranoid enough. Use the barrel vise block if it works for you, I was just making a suggestion. However, I'd really like to hear about what you know about life elsewhere in the universe:MM:
 

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I emailed SilencerCo because I didn't see a washer type shim in my SpecWar packaging, just thin shims. They told me to run the flash hider instead; not the resolution I was looking for, especially since SilencerShop's list has this brake as compatible with the SCAR 17.
 

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I emailed SilencerCo because I didn't see a washer type shim in my SpecWar packaging, just thin shims. They told me to run the flash hider instead; not the resolution I was looking for, especially since SilencerShop's list has this brake as compatible with the SCAR 17.
PM me your address and I will take care of you. Sorry they didn't help you out.
 
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