SG 550 FUNCTION PRINCIPLE

Indirect gas operation with rotating bolt is rugged and functionally dependable. It reduces the recoil to a minimum and guarantees the function even under the most extreme service conditions. Gas operation is not sensitive to various types of ammunition, varying gas pressures and different case materials. Maximum safety for the shooter as premature unlocking of the bolt through overpressure is not possible.

The gas pressure of the rifles can be regulated if the weapons are heavily fouled. The indirect gas operation prevents the bolt and receiver housing from fouling by propellant gases. The gas system can be removed as a complete assembly that is easy to clean. No exaggerated cyclic rate (excess energy); hence, lower stress levels of the weapon and better control during fully automatic fire.
 		    
   

SG 550 Standard Rifle

The SG 550 model range consists of a strategic rifle family for multipurpose use for terrestrial, maritime and airborne assignments. The SG 550 is the standard version in regular size. It offers all basic features.

GL 5040
SG 550 can be equipped with the 40 mm Grenade Launcher GL 5040.
 

 

    
  TECHNICAL DATA
SG 550 Standard Rifle		          
 


Caliber
5,56 mm (.223 Rem.)

Overall length
998 mm, 39.29“

Overall hight
210 mm, 8.27“

Length with butt stowed
772 mm, 30.39“

Barrel length
528 mm, 20.79“

Rifling
178 mm (7”),
254 mm (10”)

No. of grooves
6

Sight base
540 mm, 21.26“

Weapon weight
4,1 kg, 9 lbs.

 

 

  


Magazine capacity
5, 10, 20, 30

Mag. Weight with 20, 30 rounds
340, 480 g; 11.99, 16.93 oz.

Compat weight with 120 rounds
6,0 kg, 13.23 lbs.

Weight of empty mag. 20, 30
95, 110 g; 3.35, 3.88 oz.

Trigger pull weight
35 N (3,5 kg), 7.72 lbs.

Muzzle energy
1700 J

Cyclic rate
approx. 700 rounds/min

Function principle
Gas operated

Bolt pattern
Rotating bolt