🇨🇭 Unfired, cased, and Swiss to the bone. This SIG 550 sniper rifle — the SIG SG 550-1 Sniper, built by SIG AG in Neuhausen, Switzerland and imported by SAN Imports of Frisco, Texas — is the accurized marksman version of the Stgw 90, and it arrives exactly as it left the factory: never fired, in the original SIG hard case with its cleaning kit and magazine.
The standard SG 550 earned its reputation as one of the most accurate general-issue service rifles ever fielded. The Sniper variant takes that foundation further for police and precision use, swapping in a long, heavy hammer-forged barrel, a refined two-stage trigger, and a fully adjustable folding stock. Swiss-made SG 550 Sniper rifles reach the U.S. civilian market only through limited importation, and an unfired, complete example like this one rarely comes up for sale.
Why This SIG 550 Sniper Rifle Stands Apart
The heart of the rifle is its 25.6-inch (650 mm) heavy-contour barrel, hammer-forged with a 1:10 right-hand twist and six grooves. The extra mass and length deliver velocity, stability, and consistency well beyond what the 20.8-inch service barrel offers, while the recessed crown protects the most critical point of accuracy.
Then there is the trigger. Where the standard 550 is set heavy for military service, the Sniper’s two-stage unit is tuned for precision: a short, light take-up followed by a clean break in the low-3-lb range. Shooters who have run one tend to describe it the same way — it’s one of the best factory semi-auto triggers ever produced.
Swiss Engineering, Proven Operating System
Underneath the precision upgrades is the same long-stroke gas piston and rotating bolt that made the SG 550 legendary for reliability in Alpine cold, mud, and heavy fouling. The two-position adjustable gas valve, pivoting trigger guard for gloved hands, and folding stock all carry over, so you get a marksman rifle that keeps the toughness of a front-line service rifle.
SG 550-1 Sniper Specifications
- Manufacturer: SIG AG, Neuhausen, Switzerland
- Importer: SAN Imports, Frisco, TX (receiver marked “SG 550-1 Sniper”)
- Caliber: 5.56x45mm NATO
- Action: Semi-automatic, long-stroke gas piston, rotating bolt
- Barrel: 25.6 in. (650 mm) heavy contour, hammer-forged, 1:10 RH twist, 6 grooves
- Trigger: Two-stage precision trigger with pivoting trigger guard
- Stock: Folding precision stock with adjustable cheek piece and adjustable length of pull
- Overall length: Approx. 44.5 in. (1130 mm), stock extended
- Optics mounting: Integral receiver rail
- Support: Integrated folding bipod
- Condition: Unfired
What’s in the Box
This rifle comes complete in its original SIG-embossed Swiss hard case, fitted to the rifle, along with the factory cleaning kit and one original translucent SIG 550-pattern magazine. For collectors, keeping the case and accessories together with an unfired rifle is exactly what preserves long-term value.
Who This Rifle Is For
If you collect Swiss arms, the SG 550 Sniper is a cornerstone piece and one of the hardest variants to source in the States. If you shoot, it’s a 5.56 precision rifle with a pedigree few others can match — mount quality glass on the receiver rail, deploy the bipod, and you have a semi-auto marksman rifle that is genuinely enjoyable to stretch out at distance. Either way, this SIG 550 sniper rifle is a rare opportunity to own the real Swiss article in unfired condition.
Visit Gunshine Arms in Boca Raton
Now available at Gunshine Arms. Stop by to see this SIG 550 Sniper in person, or call us with questions — our team knows Swiss and European rifles and is happy to walk you through this one.
Gunshine Arms
2244 N Dixie Hwy, Boca Raton, FL 33431
Phone: (561) 756-8415
Email: [email protected]
Website: gunshinearms.com
In-store pickup available.
