The Strike X-Comp Thread Protector for M18x1 RH is specially made to work on a CZ Scorpion EVO using the CZ click stop latch found on the factory muzzle brake when using the CZ OEM handguard. This thread protector includes a Strike Industries Jam Nut in M18x1 RH thread to give you an easier way to assist in the installation and timing of a muzzle device without the CZ click stop latch when an aftermarket Scorpion handguard is used. Direct thread onto the M18x1 RH barrel thread retaining nut, this thread protector helps protect the crown and threads of the barrel. Whether you are deciding on a muzzle brake or not using your suppressor for transportation and storage, the Strike X-Comp Threa Mfg: Strike Industries