AR15.Com Archives
 crush washer vs peel washer
TOMPOGI  [Member]
9/30/2009 4:25:55 PM EST
What are the advantages & disadvantages of using one over the other? Is there even a difference or am I just splitting hairs?
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TacticalConcepts  [Team Member]
9/30/2009 4:31:15 PM EST
crush washers are the only way to go unless there is a proprietary shim system to mount a brake (ie KAC triple tap brake). I wouldn't even consider wasting my time with a peel washer. used one once a long time ago and when I went to the crusher washer I never turned back.

Mark
Danner130  [Team Member]
9/30/2009 4:51:57 PM EST
Originally Posted By TacticalConcepts:
crush washers are the only way to go unless there is a proprietary shim system to mount a brake (ie KAC triple tap brake). I wouldn't even consider wasting my time with a peel washer. used one once a long time ago and when I went to the crusher washer I never turned back.

Mark


+1
87GN  [Team Member]
9/30/2009 5:44:28 PM EST
Peel washers are most useful for suppressed applications. Crush washers do not crush evenly, causing the suppressor to not be perfectly parallel to the bore. This is a bad thing.

That said, I don't own suppressors, so I don't use peel washers.
bushflyr  [Member]
9/30/2009 5:49:58 PM EST
Crush washers take 3 seconds to install and can introduce tilt into a muzzle device. Peel washers take 1 minute to install and keep the device concentric. I use peel washers exclusively.
fizassist  [Member]
9/30/2009 6:55:40 PM EST
I use crush washers for flash hiders and peel washers (or no washer) for silencer mounts. See reasons above.
Shrike37  [Member]
9/30/2009 6:56:06 PM EST
Originally Posted By bushflyr:
Crush washers take 3 seconds to install and can introduce tilt into a muzzle device. Peel washers take 1 minute to install and keep the device concentric. I use peel washers exclusively.


What is different about installing peel washers?
fizassist  [Member]
9/30/2009 7:01:04 PM EST
Originally Posted By Shrike37:
Originally Posted By bushflyr:
Crush washers take 3 seconds to install and can introduce tilt into a muzzle device. Peel washers take 1 minute to install and keep the device concentric. I use peel washers exclusively.


What is different about installing peel washers?


Peeling them. Crush washers you just crush down to the desired angle or torque. Peel washers you peel off thin layers until you have the right angle at the right torque.
ryknoll3  [Team Member]
9/30/2009 8:27:42 PM EST
Originally Posted By fizassist:
Originally Posted By Shrike37:
Originally Posted By bushflyr:
Crush washers take 3 seconds to install and can introduce tilt into a muzzle device. Peel washers take 1 minute to install and keep the device concentric. I use peel washers exclusively.


What is different about installing peel washers?


Peeling them. Crush washers you just crush down to the desired angle or torque. Peel washers you peel off thin layers until you have the right angle at the right torque.


I installed an A2 with a peel washer once, and didn't find it to be a big deal. I just held it with a pliers, heated it slightly with a propane torch and used a sewing pin to seperate the layers I wanted to take off from the rest of the washer. It only took a couple minutes.
Rasp-65  [Member]
10/1/2009 2:54:06 AM EST
How about using no washers just blue Loctite?
lostman518  [Member]
10/1/2009 5:32:44 AM EST
Originally Posted By Rasp-65:
How about using no washers just blue Loctite?


blue loctite gets gummy when heat is applied
ryknoll3  [Team Member]
10/1/2009 9:02:39 AM EST
Originally Posted By Rasp-65:
How about using no washers just blue Loctite?


You would need red loctite at a minimum to keep it from coming loose with heat. The reason you use these washers is to "time" the muzzle device so it is oriented properly. The old 3-prong and A1 flashhiders do not need to be timed, so they just used a lock washer to hold the flash hider in place. You could also run them down to the barrel shoulder and tighten.

When they came out with the A2 with a closed bottom, and other muzzle brakes and flash hiders that have to be aligned a certain way, that's when they started using the peel washer. The crush washer is somewhat newer.

If you just tried to loctite it in place, when you time the device, you would probably have an unsightly gap between the barrel shoulder and the back of the FH. Just get the crush washer.
beavo451  [Team Member]
10/1/2009 10:43:55 AM EST
Originally Posted By ryknoll3:
Originally Posted By Rasp-65:
How about using no washers just blue Loctite?


You would need red loctite at a minimum to keep it from coming loose with heat. The reason you use these washers is to "time" the muzzle device so it is oriented properly. The old 3-prong and A1 flashhiders do not need to be timed, so they just used a lock washer to hold the flash hider in place. You could also run them down to the barrel shoulder and tighten.

When they came out with the A2 with a closed bottom, and other muzzle brakes and flash hiders that have to be aligned a certain way, that's when they started using the peel washer. The crush washer is somewhat newer.

If you just tried to loctite it in place, when you time the device, you would probably have an unsightly gap between the barrel shoulder and the back of the FH. Just get the crush washer.


Red loctite will not stand up to the heat.

Blue is for easy removal. Red is for more permanent applications, but can be removed with heat.

Rocksett should be used for muzzle devices (if you need thread locker).
garr  [Team Member]
10/1/2009 10:44:21 AM EST
Originally Posted By Rasp-65:
How about using no washers just blue Loctite?


I use the RED Loctite & a peel washer, I just set it up so it properly lines up with very very little torque applied (Hand tight), I find my guns are more accurate with the FH glued on instead of torqued on. The Loctite keeps it from moving & seems to be holding up fine.
I use the peel washer only because I feel ARs look strange without something behind the FH!

bigkracka  [Team Member]
10/1/2009 2:29:19 PM EST
Originally Posted By ryknoll3:
....heated it slightly with a propane torch and used a sewing pin to seperate the layers.....

Lot easier to throw it in a cup of water, the layers pop apart themselves. I used the stove to heat mine. Was still a pain in the ass, never used anything but crush washers since. Flash hiders are more than combat accurate. If you're running a precision rig you shouldn't be using a hider anyway.
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