[1] First look at the guide rail, and use your guide rail to determine whether you are suitable for a wide rail or a narrow rail fixture

Usually there are two kinds of guide rails, one is a leather rail (weaver), the width of the guide rail is 20mm, this kind of guide rail is called a wide rail clamp on the fixture

There is also a dovetail (narrow foot), the guide rail width is 11mm, the clamp used is: narrow gauge clamp; usually used in I-shaped and other rifling pipe dogs, crossbow equipment, pcp (such as condors).

[2] Secondly, the ring part of the clamp is used to clamp the lens barrel, divided into 25.4mm, 30mm and 35mm; the diameter of the sight except the thinner part between the eyepiece and the objective lens is called the diameter of the sight. How many millimeters is the pipe diameter of the mirror, and then select the fixture corresponding to the pipe diameter

[3] There are four types of wide rail fixtures and narrow rail fixtures, which can be roughly divided into: high-width/narrow fixtures, low-width/narrow fixtures

The height of the fixture, one is to pay attention to whether the short fixture can be properly installed on the gun, for example, when the diameter of the scope is too large, when the short fixture is used, the objective lens barrel is blocked by the barrel and cannot be installed; the second is to depend on the gun. Time comfort and aesthetics.

[4] The fixture is also divided into a split fixture and an overall fixture, and split clamps are common.

The integral clamp means that the two clamp rings are fixed on a whole, and the distance between the two mirror rings is fixed. This kind of clamp looks cool, but because the distance between the two mirror rings is not adjustable, it is flexible It is not as good as a split fixture; if you choose the overall fixture, you need to pay attention to whether the width between the two mirror rings is suitable for your scope (for example, the distance between the two mirror rings of some integral fixtures is too wide to be used for short-support aiming On the mirror, of course there is also an overall fixture suitable for short sights)