Griffin Armament Thread Protector for Taper Mount muzzle devices only. Not for use with M4SD or 30SD SDQD Muzzle Devices These are not required for operation, but many consider them nice to have. Suppressor mounts included with suppressors do not include thread protectors, but extra muzzle devices purchased separately do come with thread protectors at no additional charge.
Thread protector has a taper mount interface and does not shoot loose.
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