Muzzle device timing: shim kit or peel washers?

Joel

Joel

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Does anyone know of where to get peel washers or a shim kit to time an A2 flash hider?

Its about 30 degrees off without a crush washer...and just about 180 degrees WITH a crush washer.

Thought of just trying another washer as a shim, but the ones at the hardware store were not convenient sizes to work with.

Thanks!
 
Receipt said:
I’ve always just figure 8 worked them on a fine sandpaper over glass until I get the index I want.
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That works.
Also some manufacturers (Yankee Hill) make their crush washers out of a bit thinner steel (outside diameter is a bit smaller), so they crush with less force.

I don't know if peel washers are still made by anybody. But I still sometimes use them out of my supply when the mood strikes during an assembly.
 
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I used shims and a homemade barrel vice and had it pretty much 100% where I wanted it, but when I put the ceramic theadlocker and torqued it the timing was off by a few “minutes” if I look really closely. Not sure if I can get it any more accurate without overtorquing, so will just live with it
 
As mentioned TNA is your friend, a pack of various sized shims isn't a terrible thing to have. I just ordered some crush washers to go along with my shim pack.

I think how I'm doing this going forward is a shim, with a crush washer on top, should solve the problem of the over crushed crush washer, and the fight to remove it if you want to change the muzzle device.
 
Joel said:
and just about 180 degrees WITH a crush washer.
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You know that CRUSH washers are designed to be ............. crushed?


Joel said:
I crushed the crush washer about as much as a crush washer will crush haha. Or at least it feels like it to me! How much of a turn can you get out of one past hand tight?
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A crush washer can be really crushed. At least a full turn if not two?


Receipt said:
I’ve always just figure 8 worked them on a fine sandpaper over glass until I get the index I want.
Click to expand...
You sanded down something designed to be crushed? WHY?

Are we all unfamiliar with what the word "crush" means? :rolleyes:
 
I Dont Care About You said:
You sanded down something designed to be crushed? WHY?

Are we all unfamiliar with what the word "crush" means? :rolleyes:
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Well, when the torque required would exceed reasonable levels for the strength of threads and not achieve the desired timing..
I understand the term crush yes, it’s been my experience they in fact don’t “crush” much at all with typical muzzle device torque levels.
 
I Dont Care About You said:
You know that CRUSH washers are designed to be ............. crushed?



A crush washer can be really crushed. At least a full turn if not two?
Click to expand...


Two full turns on the crush washers for muzzle devices is a new one to me though. That's a lot of torque.

Receipt said:
Well, when the torque required would exceed reasonable levels for the strength of threads and not achieve the desired timing..
I understand the term crush yes, it’s been my experience they in fact don’t “crush” much at all with typical muzzle device torque levels.
Click to expand...

Think we just feel like flexing or giving people a hard time lol.
 
I did about 29 ft-lbs torque with shims. Barrel vice ensured no torque was transferred. You can make one with some 2x4 scrap pieces of wood and some of that stretchy grip tape for hockey.

Thought I remember reading crush washer should do at least 90° but less than 450° rotation (?), and that the tapered end should point away from the barrel end.
 
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