DTK VR-04 with M14 x 1l, .366 caliber, Classic type suppresser-compensators, three chambers are perpendicular to the barrel, and are effective in diverting gases and stabilizing the barrel. 8 pin with m5 thread are designed for adjustment depending from recoil and weapon movement. Any of them can be open or closed by unscrewing pin, for reliable operation it is recommended use thread connection fixing device