crush washer.....which way

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bamaranger

New member
Intending to install an A2 type crush washer on a rifle some time in the future. I have the unit on hand with its washer. I notice that the washer is tapered, sort of convex/concave curvature.

So....which way does the washer fit on the muzzle?
 
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Doug76

New member
When I pulled my muzzle brake off my DPMS (don't need the noisy thing, I use my AR for hunting) I found the crush washer was convex side to barrel, concave side to brake. When I installed the thread protector cap I put the crush washer back on the same way it came off. It seems to fit and look best that way.
 
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Ibmikey

New member
Yes the bevel should touch the barrel and concave end to the hider. Crush washers are designed to be crushed once and should not be used a second time, you may find the washer flowing over the machined lip on the barrel and necessitate cutting to remove.
 
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Doug76

New member
On my DPMS Oracle the lip is flared, so the washer is not flowing over it, and looks the same as a new one. I should add the muzzle device was not extremely tight on mine when I did remove it, so maybe that's why it isn't deformed.
 
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CTS

New member
Brownell's is a great resource. Not only for the parts and tools you need but also help installing them when needed. Midway is pretty good too.
 
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