SIG P320 for Sale
Browse SIG P320 listings from verified sellers across the U.S. on GunsAmerica.
Quick Look
The SIG P320 was introduced in 2014 as SIG Sauer's entry into the modular pistol market. Designed around a serialized fire control unit, it offers unmatched flexibility in configuration. It gained major popularity after being adopted as the U.S. Army's M17/M18, solidifying its position in both civilian and professional markets.
Why It's a Top Choice
- Modular frame allows caliber and grip size swaps
- Adopted by U.S. military as M17/M18 in 2017
- Flat-face trigger offers clean break and reset
- Extensive aftermarket support and custom options
- Available in full-size, compact, and carry models
Key Variants
SIG P320 M17
Military variant used by the U.S. Army, full-size with manual safety and coyote finish.
SIG P320 X5 Legion
Full-size competition model with tungsten-infused frame and match-grade trigger.
SIG P320 Compact
Mid-size configuration ideal for concealed carry without compromising capacity.
SIG P320 XCompact
Ergonomic compact pistol with optics-ready slide and flat trigger for CCW use.
SIG P320 AXG Classic
Aluminum frame with wood grips, blending classic styling with modern performance.
Competitor Comparison Table
| Feature | Sig P320 | Glock 17 | M&P 9 |
|---|---|---|---|
| MSRP | $500–$900 | $500–$600 | $500–$650 |
| Capacity | 15–21 rounds | 17 rounds | 15–17 rounds |
| Weight | 26–43 oz | ~25 oz | ~27 oz |
| Optics-Ready | Yes (select models) | No (MOS variant available) | Yes (2.0 OR models) |
| Trigger Type | Striker-fired, flat or curved | Striker-fired | Striker-fired |
| Notable Pro | Fully modular FCU | Proven reliability | Ergonomic grip texture |
| Notable Con | Heavier than some rivals | Limited modularity | Less aftermarket support |
Best Use Cases
- Concealed carry and personal defense
- Law enforcement and military duty
- Competitive shooting and 3-gun
- Range training and practice
- Modular firearm collectors
FAQs
Can I convert the SIG P320 to another caliber?
Yes, the serialized fire control unit allows easy caliber swaps with appropriate slide and grip modules.
What is the trigger pull weight on the SIG P320?
Factory triggers typically average 5.5–6.5 pounds, depending on variant and generation.
How does the SIG P320 compare to the Glock 17?
The P320 offers more modularity; the Glock 17 is lighter and has wider agency adoption.
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Sig P320 FCU (Fire Control Unit) - New -
$349.99
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