Sigarms Sig SG 550 SP, SG 551 SP Instructions Manual

							 
 
3.6. Filling and coupling of magazines 
 
3.6.1. Filling the magazine 
 
1. Place the tool on magazine; 
 
2. Insert the ammunition clip and press cartridges into 
magazine; 
 
3. Remove loading tool.  
 
3.6.2. Coupling of magazines 
 
1. Hold magazine vertically; 
 
2. With the floorplate of the second or third magazine pointing to 
the rear, firstly connect the upper lugs, the rotate forward and 
connect lower lugs. 
 
Coupling of more than three magazines in sequence is not 
recommended. 
 
 
 
 
Loading the cartridges into the 
magazine by means of the loading 
tool 
 
Coupling of magazines 
 
 
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							3.7. Aiming, firing 
 
To aim, align the eye, diopter or battle sight, foresight and target. 
When using the diopter, ensure that the periphery of the foresight 
tunnel and the diopter aperture are concentric. 
 
At all ranges the foresight should be aimed  at the center of the target. 
Firing is therefore to point of aim. 
 
  
 
Sight picture point of aim 
 
Bull’s eye 6 o’clock with 
sight setting “red 3” at 300 
m. 
 
 
 
 
Sight picture night sight  
 
 
 
 
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							3.8. Adjusting 
 
To correct for elevation and windage, the corresponding correction 
screw is turned with a screwdriver. 
 
By rotating the elevation correction screw and the windage correction 
screw by one click, the average point of impact in the vertical 
respectively the horizontal axis is displaced by approximately 0.15 o/oo. 
 
 
 
 
 
 
 
 
 
 
Rear sight 
 
1. Receiver casing 
2. Elevation correction screw 
3. Rear sight drum 
4. Windage correction screw 
 
 
 
 
 
 
 
 
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							Elevation: 
  
High shots are corrected by turning the elevation correction screw to 
the left. 
   
Low shots are corrected by turning the elevation correction screw to 
the right. 
   
 
 
Correction symbol on rear sight  (correction of elevation) 
 
 
 
 
 
Windage: 
 
Shots to the right are corrected by turning the windage correction 
screw to the left. 
 
Shots to the left are corrected by turning the windage correction screw 
to the right. 
 
 
 
Correction symbol on rear sight  (correction of windage) 
 
 
 
 
 
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Firing range Average point of impact correction per notch 
 
 
 
100 m 
 
200 m 
 
300 m 
 
400 m 
SG 550 
 
1.5 cm 
 
3.0 cm 
 
4.5 cm 
 
6.0 cm 
SG 551 
 
1.8 cm 
 
3.6 cm 
 
5.4 cm 
 
7.2 cm 
 
 
 
To correct for elevation or windage, the corresponding correction screw 
is turned with a screwdriver. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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							3.9. Gas valve position 
 
 
 
With the SIG SG 550/551, the gas volume required for the function of 
the weapon can be controlled by adjusting the gas valve. 
 
 
 
 
 
 
 
a. Position I  (Rib of gas valve in vertical position) 
 
Under normal conditions, firing is effected in this position. 
 
 
 
Gas valve in position I 
 
 
 
 
 
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							b. Position II                (Rib of gas valve in slanting position) 
 
When cycling or ejection problems are encountered due to heavy 
fouling or icing-up, the gas valve is to be turned clockwise as far as the 
stop. In this position, a larger gas quantity acts on the gas piston. 
 
The adjustment of the gas valve is effected manually, and, in case of a 
hot or heavily fouled weapon, by means of a cartridge or auxiliary aid. \
 
Firing with the gas valve in position II is an exception. As soon as the 
weapon works, the gas valve must be turned back to position I, 
otherwise the recoil is intensified and the weapon is unnecessarily 
stressed. 
 
 
 
Gas valve in position II 
 
 
 
 
 
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							3.10. Folding the butt 
 
Thumb in the butt catch and fold the butt so that it registers with the 
handguard under spring pressure. 
 
 
 
 
 
 
 
 
 
 
Butt folded 
 
1. Butt catch 
2. Butt 
 
 
 
 
 
 
 
 
 
 
 
 
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							3.11 Firing with mittens 
 
For firing with mittens the trigger guard can be pivoted to the left or \
right. 
For safety reasons the trigger guard must be placed in the vertical 
position before carrying out any manipulations. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Trigger guard folded 
 
1. Trigger casing 
2. Trigger guard 
 
 
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3.12. Use of accessories 
 
3.12.1. Carrying sling 
 
One end of the sling hooks into the lug on the foresight mount, the 
other end is attached to the butt. 
 
To fix the taut sling, use the clip. 
 
To maintain a taut sling, slip the clip over the sling strap. 
 
 
 
 
 
 
Sling hooked to foresight mount 
 
 
 
 
 
 
 
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