The SG 550 is a selective-fire 5.56×45mm NATO assault rifle firing from a closed bolt. It has a gas-actuated piston-driven long-stroke operating system derived from the SIG SG 540 series of rifles, which uses burnt powder gases vented through a port in …

SIG SG 550 （Sturmgewehr 90）是由 Swiss Arms AG （前身為SIG Arms AG）設計及製造的 突擊步槍。 SG 550使用折疊式 槍托，附帶可折式腳架，槍機設計與 AK 類似，半透明彈匣。 在法語稱為 Fass 90 （F usil d ass aut 90），德語稱為 Stgw 90 （St urm g e w ehr 90）。 在1970年代未期，瑞士軍隊打算研製一種新的小口徑步槍，以取代過時的Stgw 57（SIG 510）。 初步試驗是在5.6×48毫米伊格爾（Eiger）和6.5×48毫米GP80兩種彈藥之間進行選擇，原型槍則分別 …

Sep 1, 1998 · Manufactured in Switzerland by Schweizerische Industrie Gesellschaft (SIG), this semi-automatic rifle chambered in .223 Remington caliber (5.56 X 45mm) more than lives up to its name. Introduced into the company’s lineup around 1989, it’s always been somewhat of a …

The SIG SG 550 (S turm G ewehr) is a Swiss assault rifle designed by Jürgen Baumann [1] and Ennio Mattarelli around 1978 and produced by Schweizerische Industrie-Gesellschaft since 1986; production of the rifle is currently handled by SIG Sauer AG (formerly SAN Swiss Arms AG) with the privatization of SIG's firearms division in 2000.

In 2025 a new or used SIG Sauer SG 550 value varies depending on supply and demand. In the last 12 months there is great demand for a SIG Sauer SG 550 and most rifles. The Price for a SIG Sauer SG 550 has increased in cost by $0.00 in 2025 compared to 2024.

Aug 10, 2023 · The SIG SG 550 (Sturmgewehr Model 550) series was born in a Swiss Army initiative requiring an automatic weapon chambered for the 5.56x45mm NATO cartridge as a replacement for its 1950s-era SIG SG 510 Battle Rifle. Development of the new system began in 1979 and spanned into 1980.

By understanding the dan-gers inherent in the use of any firearm, and by taking the precautions de-scribed herein, you can enjoy complete safety in the use of your Rifle. Failure to heed any of these warnings may re-sult in serious injury to you or others, as well as severe damage to the fire-arm or other property.

Oct 28, 2010 · The SG550-1, a.k.a. Sturmgewehr 90 (Stgw 90), is currently the Swiss army's infantry rifle and retains the same operating system as the SG540-1—gas-operation and a rotating bolt mechanism.

Oct 6, 2020 · Made in Switzerland, the SG 550 is one of the few 5.56mm sniper rifles that was officially adopted. Developed From the SG 550 assault rifle, accuracy is improved by the addition of a sensitive double-pull trigger, and also a heavy barrel. A bi-pod is standard as is a fully adjustable stock.

Schweizerische Industrie-Gesellschaft (SIG) was no stranger to the 5.56 round. In the late 60s, SIG began work to develop a lightweight rifle chambered for the 5.56 round. The SIG SG 530 was something of a hybrid rifle. It retained the roller locks of …