This moment is extremely important. You just need to choose an optical sight, appropriate size and height of the rings, and mount them on your rifle.
The problem is simplified by having "Dovetail" or "Picatinny" slat on the upper receiver assembly.
Prismatic and red dot sights equipped with "Picatinny" mount are featured in our catalogue. In this case you don't need specific mounts. It is not necessary to adjust the reticle to horizontal and vertical plane.
When choosing the mounting, pay attention to the objective and eyepiece size of your scope.
The scope should not touch weapon parts during the installation on the mount. Having "Picatinny" mount, it is possible to mount rings (monoblock) with previously removed upper half rings. The distance between the rings and their position on "Picatinny" mount is defined by practical consideration. The scope should be placed on the lower half rings so that the clamps are not placed close to the central thickness of the body and cones of the objective and eyepiece.
Eye relief dimensions, other technical specifications and ergonomic indexes need to be considered. When the scope is set, the aiming should be comfortable in any position. It is generally thought that the scope should be displaced forward so that the eyepiece is above the rifle body shank. Before tightening the screws, set the zero plane (with the help of liquid-vial indicator or electronic level gage), reticle inclination aligns to the plumbline or the
corner at the far side of the building. The screws of the half rings should be tightened one-by-one, in crisscross manner without excessive stress. Make sure that the distance between half rings is the same on both sides. Cover the surface of the rings with alcoholic resin in order to prevent axial displacement of the scope placed in the rings.
If your rifle has only side slat (rifles "Tigr", "Vepr", "Saiga", etc.), we recommend you to buy an appropriate mount for side fixing.