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7.62 cal crush washers supposed to be thinner gauge than 5.56?


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Hi everyone, this is my first post outside of the introductions forum.

I'm pretty new to the world of 308 AR's but about to embark on my first build.  I ordered some 5.56 and some 7.62 crush washers, seemed like a good thing to have some of both on hand.  But when the ones I ordered came in I was struck by the significant difference in thickness.

The 5.56 crush washers are significantly thicker/heavier gauge than the 7.62 ones I got from same place.  I tried to get a picture from an angle that shows this well but I am not sure if I succeeded or not.  Basically the 7.62 crush washer is just a little over half the thickness of the 5.56 one and feels lighter too.

Is this normal or do I need to be buying my 7.62 crush washers somewhere else?  🙂







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Looks like DSG Arms was the vendor - they're good.  You can rotate a crush washer 540 degrees - 1.5 turns.  After that, it'll split.  Then you start over with another one.

Don't ever use a crush washer on a muzzle device that will be a suppressor host.  Use shims or peel washers only, there, in that case.

I switched up to Accu-Washers a long time ago, from Precision Armament. 

Edited by 98Z5V
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