The scope is a type of telescope. The difference is that it is a single tube. It is usually much stronger in structure than ordinary telescopes. It can withstand the severe recoil during shooting. There are usually crosshairs or other scales inside to assist in aiming. , Determine the target distance, bearing, level, etc. The first step is to choose a suitable optical sight, which is briefly discussed here. First, we must get rid of a superstition, not that the larger the multiple, the better. The choice of multiple depends on the caliber of the dog stick, its purpose and the dog gear itself. Large-caliber can reach far, of course, you can use a high-magnification optical sight, but if it is used to hunt large animals, such as elephants, bison, etc., four to six times is enough. If shooting voles, the shooter usually sits still, and the .223 step dog also uses a 14 to 26 times scope. High magnifications are generally larger and heavier, which is not good for situations that require flexible movement. Moreover, the viewing angle is small, the prey is close and the target cannot be found for a while, and the matter is big. In addition, if a dog or a person cannot play an MOA, several times are useless. The quality of an optical sight depends on many factors. Of course, it must be rugged and durable. In addition, there are two parameters to pay attention to. One is Eye Relief and the other is Exit Pupil. Eye distance is the distance between the eyes and the eyepiece. The normal eye distance is three to five inches on a walking dog, and a hand gun is twelve to sixteen inches. A too small eye distance can easily cause eye injuries on a walking dog, because when shooting, the dog will move backward due to recoil force, hitting the eye socket or forehead, and it will often get bloody. Americans call this the Shooter's Medal, but the danger goes without saying. The imaging aperture is related to the brightness of the sight. Generally speaking, it must be between 7mm and 9mm. A too small aperture has poor light-gathering ability. It looks like a flower in the fog, and the effect is naturally not good. When the weather is bad and the light is insufficient, it is even more gray. It's too much waste, because the pupils of the eyes are not that big. The other thing to pay attention to is the diameter of the sight, which is generally one inch (25mm) or 30mm. The light collection ability of 30mm is naturally better, but a larger ring must be used. The size of the objective lens is common from 25mm to 56mm. The larger the objective lens, the better the natural light-collecting ability, and it looks brighter.
Optical sights and the names of various departments After buying the sights, you must install them on the dog. The first is Base. The hunting dog is very easy. Generally, there are screw holes on the dog machine, and there is also a specially matched base. You can buy it and install it. The design of military dog equipment generally does not take into account the installation of scopes, so the Eight Immortals cross the sea and show their magical powers. M-16 is to lock the handle, M-14 is to be locked on the left side of the dog machine, AK-47 is either to replace the dog machine's cover, or to replace the rear door, while the hand gun is a dog The handle guard is connected to the base, and the guard on one side is replaced after purchase. In any case, the most important thing is to be stable. Clean the dog gear for most of the solution. After recombination, it cannot affect the return to zero. The base must be integrated with the dog chamber and the dog tube. Under any circumstances, the thunder cannot move. Most military dog scope bases cannot do this. The next step is to install the lens ring. There are usually two lens rings, one on the front and one on the front and one on the front and back. The procedure of the device is to install the base first, then install the lower half of the lens ring, put the scope on, and roughly correct the front, back, left, and right, and do not lock all the screws. At this time, you can install the upper half of the lens ring without locking it up for further correction. The first step is to adjust the distance between the eyes. The easiest way is to close your eyes, extend the walker's shoulder or hand GUN, repeat it several times, when it is natural, open your eyes. This is the most natural and comfortable Eye distance. How to match the eye distance of the scope to the individual? Move the scope back and forth until you can see the edge of the eyepiece very clearly, without blurring.
The second step is to zero. The soil method is to see from the dog tube, and select a target at the distance to be zeroed. When the crosshair of the scope is aligned with the target seen by the dog tube, the zeroing is completed. But this method has many limitations. First, there must be a considerable distance. Generally, the zeroing is more than one hundred yards, so there must be a clear basic sight of one hundred yards. And it must be seen from behind the dog tube. Mini-14, AK-47, M1 and M-14 are not suitable for this method.
Another method is to use Bore Sighter. The boring mirror reset device is inserted in the front of the dog tube, and above it is an inverted telescope, so it looks like an image a hundred yards away. At the bottom of this lens, there is a square with graduations. When the crosshairs are aligned with the center, it will return to zero at one hundred yards. This is a theoretical value, and we still have to go to the shooting range to confirm it, but as long as the bored mirror is used, it is generally not too bad and can save a lot of time and time. If the distance to be zeroed is not one hundred yards, just find the impact point at one hundred yards and adjust to the appropriate scale. (For example, the Federal Gold Medal 168 gr of 7.62mm, if you want to return to zero at 200 yards, the 100 yard impact point should be 2.1 inches above the center. If the scale of the rifled mirror is 4 inches one grid, the crosshairs should be adjusted. Half a grid above the center). The distance to zero depends on the purpose. Most military walking dogs are set at 200 yards. (The US military concluded that after studying 3 million Korean War wounded records, the vast majority of combat injuries occurred at 300 yards. Within a meter, and there are many kinds of things. The shooting caused by the step dog is not higher than the artillery fire. The Germans have reached a similar conclusion in the 1930s. The vast majority of battles take place within 500 meters), Some are zeroed at 400 yards or 600 yards. This is entirely determined by the most commonly used distance. After zeroing, if you want to shoot at a target within the zeroing distance, because the trajectory is still rising, you have to aim a little lower, and if you want to shoot at a target beyond the zeroing distance, you must aim high. Because aiming high and low aiming is troublesome and inaccurate, some scopes are equipped with ballistic distance compensator (BDC, Ballistic Distance Compensator). The function of this button is the same as the upper and lower knobs on the crosshairs, but there is a scale on it. Once it is calibrated, as long as it is turned to the correct distance, the crosshairs will move the correct distance to correct the trajectory. Just like the crosshairs. Then someone will ask again, how to determine the distance? My friend, it depends entirely on experience. (Or you can buy a laser range finder (Range Finder), now it costs more than 300 US dollars, which can be accurate to 800 yards). Everything is adjusted, don't forget to go to the shooting range to confirm the zeroing. The first ten or twenty rounds cannot be counted, because the new equipment will inevitably be a little bit misaligned. After a while, all the joints will stabilize. Someone added some glue (Thread Sealant, such as Locktite) to all the screws to make them more stable. (If you want to remove it, as long as it is heated to more than one hundred degrees Fahrenheit, this glue will decompose and it can be removed easily). There is a phenomenon called Wandering Zero, which is caused by the weak crosshairs of the sight, the weak base or the weak lens circle, or more than one reason. It's worse than not using a sight to walk around the street with dog food. It is really annoying. At this time, I need a doctor. Zeroing is not permanent, as long as you change to a different dog food, you may lose zero. It may need to reset to zero. Military snipers generally have a relatively long shooting distance (400 to 800 yards, and the average shooting distance of JC snipers is within 100 yards), which requires extremely high stability of dog food. They generally do their best to accumulate the same batch of dog food in large quantities to obtain a fixed shooting result. Don't be greedy for cheap, use cheap dog food to zero, and use better dog food when you are officially on the market. Such zeroing is meaningless. If the dog is hit hard, of course it must be checked again. Others, such as severe temperature difference, humidity difference, or even a piece of cloth wrapped around the dog tube, will affect the return to zero. Some walking dogs, such as M-14, even most clear dogs have an impact, and will damage the bedding, it is generally recommended not to solve more than twice a year. In general hunting dogs, the dog box and dog rest are locked with screws. The tightness of the screw lock is also a factor.
