2.5.1. To check the rifle for good condition, as well at to set its further ready-for-use condition periodically inspect the rifle.
During inspection make sure that all the rifle parts are present and the external parts are free of rust, dirt, dents, scratches, nicks, chipping and other damage, since they may interfere with the normal operation of the rifle mechanisms and the optical sight.
Besides, check condition of the lubricant on the rifle parts visible without disassembling the rifle. Make sure that the magazines, the knife bayonet, the accessories, the slip cover for the optical sight, the carrier for the optical sight and magazines, as well as the bag for SPTA are not missed, make sure that there is no foreign matter in the barrel bore.
Check the parts and mechanisms for proper operation. When checking the operation of the rifle parts and mechanisms, release safety lock, retract the bolt support by the reloading handle all the way back and release it; the bolt support should be stopped in the rear position by the bolt catch.
Detach the magazine, slightly retract the bolt support by the handle and release it; the bolt support should energetically return to the front position. Set the rifle at safe and press the trigger; the trigger should not move rearward completely, and the hammer should remain cocked.
Release safety lock and press the trigger; a click should be heard, which is indicative of the energetic blow delivered by the hammer against the firing pin.
Set the rifle at safe again and attach the magazine; the bolt support should not move backward, the safety lock should be reliably retained in the required position.
Check the feed of cartridges into the cartridge chamber, extraction and ejection of fired cases (cartridges). Fill the magazine with dummy cartridges, attach it to the rifle, and without pressing the magazine latch, try to detach the magazine with the effort of the hand, the magazine should freely enter the opening of the receiver and should be securely retained by the magazine latch.
Reload the rifle several times, the dummy cartridges should be fed, without any delay, from the magazine into the cartridge chamber and rushly extracted from the receiver outward.
When checking the condition of the optical sight, make sure that the objective and eyepiece lenses are not broken. Check to see that the knobs rotate smoothly and are reliably fixed in the required position, they are free of play; the sight is free of play and the clamping screw reliably secures the sight on the rifle; the reticle illuminating set is in sound condition; to this end, fit the cap onto the objective, switch on the tumbler switch and look into the eyepiece (if the illuminating set is in good repair, the reticle is seen distinctly; if the reticle is not seen, replace the cell or the electric lamp).
If the sight is not free of play or the handle-guiding lug does not enter the recess in the bracket, with the sight reliably secured on the rifle, adjust the clamping screw.
To this end, detach the sight from the rifle, press the slide to the handle (compress the spring) and screw the clamping screw adjusting nut in or out.
Inspect cartridges before firing. When inspecting the cartridges, make sure that the cartridge cases are not bent and free of rust, the bullet does not play in the cartridge case mouth; the primer is free of verdigris and cracks, no setback of the primer occurs; are there some dummy cartridges among live cartridges or not. All the defective cartridges are to be transferred to the depot.
2.5.2. All defects of the rifle, the optical sight, magazines and accessories should be immediately eliminated. If there is no opportunity to eliminate the troubles in the subunit, transfer the rifle (the optical sight, magazines, accessories) to the repair shop.
2.5.3. Careful handling the rifle and proper care of it provide reliable, trouble-free operation and long service life of sniper rifle parts and mechanisms. However, in case of clogging and wear of rifle parts and mechanisms and in case of careless handling the rifle or in case of cartridges damage, stoppages in fire may occur.
If during firing stoppages occur, reload the rifle, for which purpose energetically retract the bolt support by the handle, release it and proceed with firing.
If the stoppage is not eliminated, determine the cause of the trouble and eliminate the stoppage as instructed in the Table No. 2.
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