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Old January 9, 2019, 12:07 PM   #1
jjciii
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Join Date: January 8, 2019
Posts: 3
AR-10 barrel/ brake ?

Hello,
I have what I believe to be an older Armalite AR-10. I say that because the muzzle brake has 4 set screws on it (I took them off), which makes me believe the brake is not pinned? And having 4 set screws to remove anything from a barrel end now days, makes me say - it is pre-ban. But really don't know.
In any event, I am not sure how to proceed because it does not just fall off. I have read about pinned brakes here and I would need to 1) find the pin 2) grind down to flat and then unscrew the brake - if it is pinned. But again, is mine pinned and has 4 set screws?

The whole purpose of this is to put on a threaded different break with external threads. At this point, I am not sure if I have threads.

I want to know how to proceed before I just start clamping down and twisting the brake (clockwise) to try to remove it.

AND-
if I don't have threads, then I would be looking at buying an approx. same length barrel, but lighter. Dame this thing is heavy!
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Old January 10, 2019, 09:30 PM   #2
Mobuck
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Join Date: February 2, 2010
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I have an older "post-ban" AR that has this combination.
My guess is there's a cut just behind the muzzle that the set screws tighten into. After removing the set screws, a few light taps with a non-marring hammer should pop the brake off.
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Old January 11, 2019, 01:09 PM   #3
4V50 Gary
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Any pins visible? None? Then tap it forward with a rawhide mallet and if you don't have one, a piece of hardwood.
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Old January 11, 2019, 03:02 PM   #4
jjciii
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Join Date: January 8, 2019
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thanks for the info. I will try the malette.
here is the photo
-well that did not work. photo to large and I don't see how to get it smaller. I will have to research this.
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Old January 11, 2019, 03:15 PM   #5
jjciii
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Join Date: January 8, 2019
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here is the photo
you can see two of the 4 set screw holes
Attached Images
File Type: jpg IMG_20190111_122946716.jpg (22.7 KB, 14 views)
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