Product reviews for LBE UNLIMITED CRUSH WASHER FOR AK47

I initially got two of these for AKs that I had muzzle devices for where I was just about one full rotation off. I didn’t want to sand down my muzzle device and I didn’t want one exposed thread so I found these! Works PERFECTLY! They are aluminum I believe? However this crush washer worked beautifully on my M90 using an AK74 style muzzle brake. I’m really happy with this product.