Washers for Muzzle Device

[johnjohn]

Can I use a regular washer from a hardware store to index my muzzle device or does it have to be crush washer or peel washer from Brownells?

Thanks

[Adam Lilja]

Needs to be a crush washer if you want it to crush :P

[johnjohn]

I have a crush washer but it doesn't fit over the threaded part of the barrel. Does anyone know if there are different internal diameter sizes for crush washers? If not, I guess I'll be sanding the ID of the one I have to make it fit.

Thanks

[johnjohn]

Went to a gun shop and they gave me a larger internal diameter crush washer. Looks like it will fit.

Thank you all.

[LRRPF52]

Just remember to use very minimal torque when installing muzzle devices. The former AMU commander, who is a big gun guy and shooter/competitor, said zero torque with Rocksett is one of the preferred methods. It becomes harder when you have a muzzle device that requires timing, like an A2 flash hider.

[Klem]

Just remember to use very minimal torque when installing muzzle devices. The former AMU commander, who is a big gun guy and shooter/competitor, said zero torque with Rocksett is one of the preferred methods. It becomes harder when you have a muzzle device that requires timing, like an A2 flash hider.

I prefer to use a split washer and hand tight only. Provides enough continual pressure so as not to come off in the field. But then let's you unscrew it by hand afterwards to inspect/clean the crown. You can also use threaded suppressors without the heartache of cracking glue or wasting crush washers every time.

If the device needs timing like '52' is referring to then you can use crush washers, or a peel washer in conjunction with a split washer, or a few of the varying thickness thin washers from devices like the Lantac Dragon in conjunction with a split washer.

Crush washers are one-time-use only. If your device does not need to be timed then you can however get a few uses out of them but you have to cinch it up a little tighter each time. So, you get a few goes but eventually there is no more give in the washer. If the device needs to be timed then unfortunately crush washers are literally one-time-use only.

If you use Rockset then you will never be able to regularly clean/inspect the crown. If you do not care about this then fine, glue the thing and put up with the permanency. Knights provides tubes of Rockset with their muzzle devices in the hope you will never complain their devices came off...and why would anyone want to remove a Knights device anyway!

The original A1 flash eliminator did not need to be timed and used split washers. When the A2 hider came along with the solid section needing timing to be at the bottom to prevent ground/dust blast then the industry Milspec went to crush washers. Time went by and split washers were forgotten, but they work just fine.

Yes, you can use hardware washers but you will need to use glue or a split washer in conjunction to prevent the device coming loose when you don't want it to. Plus, finding one that has the right OD will be difficult. And if you do it will likely be shiny silver needing a paint job, unless you don't care about looks. Turning down the OD of a normal washer is doable if you buy a few. Clamp them tightly on a bolt and nut so the jaws of the lathe can grip one end and turn down the OD of the washers at the other end.