Installing crush washer

[Szczinator]

Ok, ok... This may seem Duh! But does it matter how the crush washer is placed on the barrel of the AR15.

1. Should it go on with taper toward the receiver and the concave toward the muzzle?

2. Should the concave go toward the receiver and the taper toward the muzzle?

What is the best way to turn the muzzle brake to get it indexed correctly.

I'm put a Surefire muzzle brake on.

Don't laugh at me, you'll have an easy question someday the cramps your brain too.

[Steve RA]

I think the washer will work either way, index the comp as you screw it on, don't back off as the "crush washer" isn't a spring.

[Czhase]

I put the taper toward the receiver, to tighten just find something you can stick through one of the ports and gives you some leverage, wrap it in a rag or some tape so you don't ding up the comp.

[Szczinator]

Thanks guys, hope I don't break this.

[ltdmstr]

All of the Surefire brakes I've installed have come with shim packs and Rockset, not crush washers. Are you sure you're using the correct part?

[hamiltonarmory]

Tapered side toward the receiver, concave side toward the muzzle

[LoganbillJ]

Allows for perfect alignment with the least amount of shim possible. A better alternative to peel or crush washers IMO.

http://www.brownells.com/rifle-parts/barrel-parts/rifle-barrel-hardware/washers/ar-15-m16-ar-style-308-accu-washer-muzzle-device-alignment-system-prod54363.aspx

[PatJones]

Allows for perfect alignment with the least amount of shim possible. A better alternative to peel or crush washers IMO.

http://www.brownells.com/rifle-parts/barrel-parts/rifle-barrel-hardware/washers/ar-15-m16-ar-style-308-accu-washer-muzzle-device-alignment-system-prod54363.aspx

I use those extensively in my shop. They're kinda expensive if you're only going to use one though.

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[LoganbillJ]

As do I. After using them I don't think the cost is bad even if you only use one considering the amount of headache you save over timing with a peel washer.

[Mark Gale]

The crush washer is fine with a Surefire muzzle device unless suppressor use/alignment is a factor. They also are self centering when you use them on barrel that has a relief cut before the shoulder. Shims and peel washer have a tendency to creep into the relief cut during installation.

[PatJones]

I feel it's bad practice to install a suppressor adapter with a crush washer even if the owner doesn't currently use it with a can. The owner may acquire a suppressor or sell the rifle. You have no control of this after it leaves your shop.

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[alma]

Loctite on the break? Mine came loose at the last match.

[PatJones]

Loctite on the break? Mine came loose at the last match.

Are you running a can? Loctite softens with heat, that's how you remove the red high strength stuff. Semi auto guns can get hot enough to soften the loctite. Rocksett resists the heat but that makes it a pain to remove. I wouldn't glue on a break unless I was screwing a can to it.

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[LoganbillJ]

Proper torque is all that is necessary. If you need locktight your comp is not timed correctly.

[alma]

Thanks