Shadow Systems, High Temperature O-Ring

Threaded Barrel O-Ring

Have you ever had your thread protector come loose?  Place this O-ring between the barrel and your thread protector and tighten it down hand tight.  The compression of the O-ring will add sufficient friction to keep the threat protector from coming loose.

NOTE: This O-ring MUST be removed before using a muzzle device, such as a comp or suppressor.  Shadow Systems will not be liable for damage caused to a suppressor by firing it with the O-ring in place.