SIG-550

The SIG SG 550 is a Swiss 5.56 x 45 mm assault rifle family adopted by Switzerland as the Sturmgewehr 90. It replaced the heavier SG 510 / Stgw 57 with a lighter rifle suited to modern infantry ammunition while preserving Swiss expectations for accuracy and build quality. The SG 550 is therefore a central entry for Switzerland's post-Cold War small-arms identity.

The SG 550 family is known for accuracy, durability, and careful manufacturing. Variants such as the SG 551 and SG 552/553 adapted the family to carbine and compact roles while retaining common design principles. Compared with more mass-market rifles, the SG 550's value is its refined execution and suitability for a militia-based force that expects reliable individual weapons.

Operationally, the SG 550 is more than a 5.56 mm rifle. It reflects Switzerland's approach to citizen-soldier marksmanship, controlled domestic production, and long service lives for small arms. Placing it beside the SG 510 and SG 540 pages gives readers a clear development path across Swiss rifle generations.