SG550

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SG550 may refer to:

SIG Arms SG550

SIG Arms SG550 Sniper

SIG Arms SG551

SIG Arms SG552 Commando

• One of the members of the SG550 family of rifles, all of which are chambered for 5.56x45mm NATO:
  • The SIG Arms SG550, a combat rifle
  • The SIG Arms SG550 Sniper, a precision rifle
  • The SIG Arms SG551, a combat rifle
  • The SIG Arms SG552 Commando, a combat rifle