Do I need to use a flash hider crush washer?

Gillen1

Gillen1

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I may be posting this in the wrong spot, but I figure you guys here will know best.

I have a Remington spa tactical in 223 with a 16.5"threaded barrel. Now I don't really need the flash hider, but I like how it looks on the gun, and well might as well put the threads to use.
I bought an extended Daniel Defense flash suppressor and it looks pretty bad with the crush washer on it. With it off (and a few pieces of can aluminum to get it lined up properly) it looks a lot better.

Now do I need to have the crush washer on to have it not mess with my gun negitivley? Will having spacers in there make the fh come off with use? I'm new to the semi tactical stuff so I hope I don't sound too stupid!
Thanks.
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Crush washers are a one time use deal and they work fine but are not necessary. A washer made of softer metal will serve just as well. You can also look into a shim kit. They come with a few shims in varying thicknesses to index your muzzle device where you want it with the torque you want. The bonus is they are reusable and can be used with less torque if you frequently remove your muzzle device. Questar sells PWS shim kits for 1/2" and 5/8" threads. Since its 1/2", a 14mm copper oil drain plug gasket will work too. You can buy them from most parts stores for cheap.
 
Thanks for the tip, I also saw somewhere where basic O rings can also work. Now I Don't have a torque wrench, should I get one since everyone talks about how important it is. The only other muzzle device I have is on a SVT-40 and it's not exactly removable!
 
I think it does need to be indexed since the bottom is designed to not have a hole so it won't kick up dirt. I guess it does not matter if that is not on the bottom as I do not shoot prone. Thanks for all the tips everyone.
 
An o-ring is ok for low temp/vibration but I wouldn't trust one on a centerfire. The device does not need to be torqued to spec or anything, a crush washer just requires more torque to do its job. You want about 1/4 turn of crush for proper preload otherwise it may come loose. Some are softer than others while some need a gorilla to get 1/4 turn out of it. Once removed, it is tossed and replaced. A shim kit is what you'll want to index your device nicely. Another trick is to lightly sand a washer a little at a time to index the device where you want it. Again, soft metals are your friend here.
 
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