The quasi-constellation is the wing guard, which is the quasi-constellation style of AK series produced abroad. Seeking science?

Take it literally. Wing guards are like the word "mountain", but the two sides are long and the line of sight in the middle is shorter. No contact. This is the sight style of AK series in other countries. At 56 and 8 1 in China, the sight is connected to the top, that is, there is a vertical bar in a small circle, which is the sight, and the wings on both sides are connected to it. China imitates AK because soldiers aim at the wrong thing when the light is bad. The two wings next to the sight "mountain" are used as sights. ?

As shown in the figure, when the muzzle is obliquely cut, there will be upward airflow when the bullet is ejected from the barrel, and the muzzle will jump upward due to recoil. The upward airflow brought by the anti-jump device will generate downward force, which will offset part of the upward jumping force of the muzzle and reduce the muzzle jump caused by recoil. The reason why the incision on the way is inclined is mainly because the upward movement of recoil caused by shell throwing is not vertical. Therefore, the downward pressure of the anti-jump device should also be designed to be inclined.