Protective threaded, usually equipped with all new guns. But in some kits, with a dtk already installed, a protective nozzle may not be available. For 12 caliber rifles, it is recommended to have a nozzle in the set to protect the thread, as this caliber is quite versatile, the thread can be installed as Paradoks for the firing of a bullet, and various compensators, as well as under the firing of a shotgun, without the use of previously listed equipment.
Option # 2 Saiga 410 thread protector
Option # 2 Saiga 20 thread protector