Sig Sauer P320 9mm x 19 with 7-15rd Mags and Orig. Box
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Sig Sauer P320 9mm x 19 with 7-15rd Mags and Orig. Box
Sig Sauer P320 9mm x 19 with 7-15rd Mags and Orig. Box
🧱 Overview
Manufacturer: Sig Sauer (USA)
Model: P320
Caliber: 9mm Luger (9x19mm)
Action: Striker-fired
Type: Semi-automatic pistol
Platform: Modular (Fire Control Unit-based)
📐 Specifications (Base Full-Size Model)
| Feature | Description |
|---|---|
| Caliber | 9mm (9x19mm) |
| Barrel Length | 4.7 inches (Full Size), 3.6–4.4" for Compact/Carry |
| Overall Length | ~8.0 inches (Full Size) |
| Height | ~5.5 inches |
| Width | 1.3 inches |
| Weight | ~29.5 oz (unloaded, Full Size) |
| Capacity | 17+1 (Full Size), 15+1 (Carry), 12+1 or 10+1 (Compact/Subcompact) |
| Frame | Polymer grip module |
| Slide | Stainless steel, Nitron finish (matte black) |
| Sights | SIGLITE night sights (optional), X-Ray3 (on higher trims), or contrast sights |
| Trigger | Striker-fired, ~6.0 lbs, smooth and crisp |
| Safety | Internal striker safety and disconnect; optional manual thumb safety |
| Accessory Rail | M1913/Picatinny rail (Full Size, Carry, Compact) |
🔄 Modular Fire Control Unit (FCU)
Core innovation of the P320 platform
The serialized, drop-in FCU (fire control unit) is the legally controlled firearm component.
Allows the user to swap:
Grip module size (Full, Carry, Compact, Subcompact)
Slide length (3.6", 3.9", 4.7", etc.)
Caliber (9mm, .357 SIG, .40 S&W — depending on kit availability)
Enables one pistol to be easily reconfigured to fit various roles: duty, carry, competition, etc.
⚙️ Variants
| Variant | Key Features |
|---|---|
| P320 Full Size | 4.7" barrel, 17+1 capacity, ideal for duty or home defense |
✅ Pros
✅ Modular design offers unprecedented flexibility
✅ Reliable and widely tested platform (U.S. military, police, civilians)
✅ Smooth striker-fired trigger
✅ Optics-ready variants available (ROMEOZero, DeltaPoint Pro, RMR)
✅ Large aftermarket support (triggers, slides, frames, holsters)
✅ Safe and drop-tested (post-upgrade models)
❌ Cons
❌ Slightly bulkier than some competitors in the same class (e.g., Glock 19)
❌ Original design had drop-fire concerns (resolved in post-2017 versions)
❌ Modularity can add cost if you want multiple configurations
❌ Trigger reset not as short/crisp as in some competition pistols (without upgrades)
🔫 Best Uses
| Application | Suitability |
|---|---|
| Duty Pistol | ✅ Excellent (used by U.S. Army & Marines) |
| Concealed Carry | ✅ Compact and Carry models are well-suited |
| Home Defense | ✅ Reliable, high capacity, rail for light/laser |
| Competition | ✅ Especially X-Series and Legion variants |
| Range & Training | ✅ Ergonomic and consistent shooting platform |
🔚 Conclusion
The Sig Sauer P320 9mm is a highly adaptable, striker-fired handgun that combines reliability, innovation, and modern ergonomics. Its modular design makes it one of the most versatile handguns on the market, whether for civilian carry, law enforcement, military, or competition shooting. With the success of the M17/M18 in the U.S. Armed Forces, the P320 has earned a reputation as a serious workhorse in the handgun world.
Make
Sig Sauer
Model
P320
Caliber
9mm
Action
Striker Fire
Capacity
17+1
Barrel length
4.7
Overall length
8
Length of pull
na
Gun weight
29oz
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