SIG SAUER P320 Full Size 4.7″ 9mm Optic Ready (2)17rd
- Firearms ship to the FFL dealer you choose, in any state
- Free shipping on orders over $99 · ships in 1–2 business days
- 30-day returns on unused parts and accessories
Specs at a glance
About this product
The SIG SAUER P320 Full Size 4.7-inch 9mm Optic Ready (2)17rd is a modular, striker-fired pistol built for accuracy and control right out of the box. This full-size handgun ships with two 17-round magazines, SIGLite night sights, and a PRO optic footprint so you can mount your favorite red dot without extra machining. At $523.37, it delivers proven reliability for home defense, target shooting, or duty use.
| Manufacturer | SIG SAUER |
|---|---|
| Model | P320 Full Size |
| Material | Stainless steel slide, polymer grip module (per manufacturer specs) |
| Compatibility | All P320 grip modules and holsters designed for full-size 4.7-inch barrel |
| Finish | Nitron black |
| Weight | 29.4 oz (empty, with magazine) |
| Condition | New |
Key Features
- PRO Optic Cut – Why it matters: This factory-milled slide accepts most popular red dot sights (like the SIG ROMEO1PRO, Leupold DeltaPoint Pro, and others) without needing a plate or gunsmith visit, so you can get on target faster.
- SIGLite Night Sights – Why it matters: Tritium front and rear give you a clear sight picture in low light, which is critical for home defense or nighttime range sessions.
- Two 17-Round Magazines – Why it matters: You get a spare right in the box, saving you $40–50 compared to buying extra mags separately.
- Full-Length Accessory Rail – Why it matters: Mount a weapon light or laser without adapters, making this pistol ready for dark houses or outdoor use.
- Modular Grip System – Why it matters: Swap grip modules in seconds to fit different hand sizes or add a manual safety, all without tools.
Who It’s For
This P320 is a solid pick if you’re setting up a home defense pistol, hitting the range weekly, or carrying on duty. New shooters will appreciate the controllable recoil and easy-to-change grip, while experienced owners will like the optic-ready slide and 4.7-inch barrel for better sight radius. It’s also a good choice for anyone who wants one gun that can adapt—swap the grip module to compact size later if you decide to carry concealed.
Pros & Cons
- Pro: Modular design lets you change caliber or grip size later (9mm, .357 SIG, .40 S&W available).
- Pro: Striker-fired with a consistent trigger pull (about 5.5–6.5 lbs).
- Con: The PRO optic footprint is not compatible with RMR or Shield RMSc without an adapter plate—check your dot before buying.
Comparison
| Feature | SIG P320 Full Size | Zev Technologies OZ9 | Agency Arms AOS G17 |
|---|---|---|---|
| Barrel Length | 4.7 inches | 4.49 inches | 4.49 inches |
| Optic Cut | PRO footprint (factory) | RMR footprint (factory) | Agency Optic System (interchangeable plates) |
| Magazine Capacity | 17 rounds | 17 rounds | 17 rounds |
| Price | $523.37 | $1,200+ | $900+ |
| Modular Grip | Yes (full size, carry, compact) | Yes (Zev grip module) | No (standard Glock frame) |
FAQ
Does this P320 come with the optic mounting plate?
Yes, the pistol ships with the PRO optic cover plate installed, plus the necessary screws for mounting a red dot. You do not need to buy a separate plate.
What holsters fit this full-size model?
Any holster made for a SIG P320 Full Size with a 4.7-inch barrel will work. The accessory rail is standard, so most light-bearing holsters also fit.
Can I use this for concealed carry?
The full-size grip and 4.7-inch barrel make it harder to conceal, but some people do with a good holster and belt. If you want to carry, you can swap to a compact or carry grip module later.
Is the trigger the same as other P320s?
Yes, it uses the standard P320 striker trigger with a flat or curved trigger shoe (depending on production date). It breaks around 5.5–6.5 lbs.
Ready to Order?
Grab the SIG SAUER P320 Full Size 4.7-inch 9mm Optic Ready (2)17rd today. It ships to all 50 states, leaves our shop in 1–2 business days, and comes with a 30-day return policy. Checkout is secure.
- ✅ Nationwide delivery (all 50 states)
- ✅ Ships 1–2 business days
- ✅ 30-day returns
- ✅ Secure checkout
Browse more in our Semi Auto Handguns or check out Pistol Parts & Accessories and Optics & Sights.
Last updated: April 2026