The purpose of the gas regulator adjustment is to ensure correct functioning of the weapon, with maximum gas exhaust, or rather minimum gas intake necessary to operate the rifle efficiently, without causing undue wear on the moving parts. 1. Method of adjustment
(IMPORTANT: GAS PLUG SHOULD BE UP IN THE LETTER "A" OR LINE T POSITION FOR AUTO OPERATION)
Methods of gas regulator adjustment may vary according to individuals, but we suggest the following procedure:
a. Fit an empty magazine on the rifle.
b. All firing is then affected by inserting the cartridges the chamber, one by one, through the ejection opening.
c. The correct setting is determined by the holding open device engaging, or failing to engage, the mechanism.
Turning the gas regulator to the left (anti-clockwise) causes the opposite effect: gas escape is increased and the balance available to work the piston is decreased. By a system of "clicks" and engagement of the gas regulator spring, the regulator has 13 different positions (12 "clicks" to open fully). To make setting in any given position easier, figures are engraved on the gas regulator, the figure I corresponding to the completely closed position and one figure for every 2 "clicks" opening. Example: when the figure 5 is opposite the gas hole, the gas regulation corresponds to 8 "clicks".
Starting with the gas regulator sleeve fully screwed against the gas block (fig. 6). Unscrew the sleeve one turn so that the figure "7" on the sleeve is in line with the axis of the rifle (fig. 7); this is the fully open position of the gas regulator sleeve and, when a round is fired, causes a short recoil (holding open device fails to engage the mechanism).
Screw the gas regulator sleeve forward click by click and fire a round after each adjustment, until the holding open device engages the mechanism.
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