SIG 551 for Sale
Browse SIG 551 listings from verified sellers across the U.S. on GunsAmerica.
Quick Look
The SIG 551 is a Swiss-designed assault rifle developed in the late 1980s as part of the SIG SG 550 series. It offers a robust gas-operated system with a focus on accuracy and durability. Today, the SIG 551 remains a respected choice in military and tactical circles worldwide.
Why It's a Top Choice
- High reliability in harsh conditions
- Accurate 5.56x45mm NATO chambering
- Versatile folding stock design
- Robust Swiss manufacturing quality
- Good aftermarket optics compatibility
Key Variants
SIG 551 Carbine
Compact variant suited for close quarters and special operations units.
SIG 551 SWAT
Enhanced version with accessories for law enforcement tactical teams.
SIG 552 Commando
Short-barrel model favored for its maneuverability in urban settings.
Competitor Comparison Table
| Feature | SIG 551 | HK416 | FN SCAR |
|---|---|---|---|
| MSRP | $2,500+ (varies by config) | $3,000+ | $3,500+ |
| Capacity / Size | 20-30 rounds, 20\" barrel | 30 rounds, 14.5-16\" barrel | 20-30 rounds, 16.25\" barrel |
| Weight | 8.4 lbs (3.8 kg) | 7.9 lbs (3.6 kg) | 7.9-8.9 lbs |
| Optics-Ready | Yes, integrated rail | Yes, Picatinny rail | Yes, modular rails |
| Trigger Type | Double-action/single-action | Single-stage | Single-stage |
| Notable Pro | Exceptional build quality | Proven in military use | Highly modular platform |
| Notable Con | Heavier than peers | Higher price point | Limited aftermarket |
Best Use Cases
- Military and tactical applications
- Law enforcement duty use
- Range training and marksmanship
- Home defense for experienced users
- Firearms collection and enthusiasts
FAQs
Can I use standard 5.56 NATO magazines with the SIG 551?
Yes, the SIG 551 accepts standard STANAG 5.56x45mm NATO magazines compatible with NATO rifles.
What type of gas system does the SIG 551 use?
It utilizes a short-stroke gas piston system for reliable cycling and reduced fouling.
How does the SIG 551 perform in adverse conditions?
The rifle is renowned for durability and reliability in harsh environments, maintaining function in cold and dusty conditions.
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