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5/11/2005 10:26:20 PM EDT
I'm trying to install an A2 flash hider on a Colt M4 barrel.  I bought a GI flash hider and washer from SAW, but the washer appears to be the wrong one.  It is a flat washer and when I install the flash hider, it is over 180 degrees off -- the closed part of the flash hider is on top.  I don't think this flat washer has enough crush for me to rotate the flash hider 180 degrees.

What is the correct crush washer to use and where can I get one?  I notice the stock washers on recent factory builds are black and appear to have a taper in them?  Are these the crush washers I should be using?

I'd appreciate any advice on this!
5/12/2005 12:00:15 AM EDT
[#1]
Yes you need a crush washer to index the flash hider, ADCO sells them and will not charge a arm and a leg for shipping.
5/12/2005 4:03:53 AM EDT
[#2]
If the M4 barrel is 14.5 inches an A2 hider will not bring the length to 16 inches.  Not NFA compliant.  Try a Phantom or Vortex.
5/12/2005 6:00:40 AM EDT
[#3]

Quoted:
If the M4 barrel is 14.5 inches an A2 hider will not bring the length to 16 inches.  Not NFA compliant.  Try a Phantom or Vortex.



It must be permanently attached.
5/12/2005 7:07:23 AM EDT
[#4]
Easy guys.
arporro, is the barrel 16", or 14.5" long?
If it is a true M4 barrel it will be 14.5" long, and you'll have to permanently install a flash hider that will bring the total length to 16" by BATF rules.
If the barrel is 16" long, it is an M4gery and you can put any flash hider you want on it without permanently attaching it.
Use a crush washer to index it, peel washers are a pain in the ass.
5/12/2005 1:03:21 PM EDT
[#5]
Hi all,

I appreciate the advice.  After doing some research, it appears that SAW sent me a peel washer -- thought I ordered a crush washer.  Oh well.

Don't worry about the barrel length, it is 14.5", but it is for a NFA registered M16
5/12/2005 1:58:29 PM EDT
[#6]
was just gonna say,,, check to see if it is a peel washer
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