Description
The Sig Sauer P320 Compact 9mm — 3.9in barrel, 2x10rd is a modular striker-fired pistol built for everyday carry and duty use. It ships with a medium-compact polymer grip module, an optic-ready slide, and SIGLite night sights. Two 10-round magazines make it Massachusetts-compliant, while the 3.9-inch DLC/Nitron-coated carbon steel barrel delivers reliable accuracy out of the box.
| Manufacturer | Sig Sauer |
|---|---|
| Model | P320 Compact |
| Material | Stainless steel slide, polymer grip module |
| Compatibility | P320 full-size and compact grip modules (per manufacturer specs) |
| Finish | DLC/Nitron coating on barrel, Nitron slide finish |
| Weight | 25.8 oz (unloaded, with magazine) |
| Condition | New |
Key Features
- Modular Grip System — Why it matters: Swap grip modules in seconds to fit different hand sizes or carry preferences without buying a new gun. The medium-compact module balances concealability with a full-firing grip.
- Optic-Ready Slide — Why it matters: Mount a red dot directly without milling. The slide is pre-cut for popular footprints like the Romeo1 Pro and Delta Point Pro, giving you faster target acquisition in low light.
- SIGLite Night Sights — Why it matters: Tritium front and rear glow for 12+ years, allowing confident aiming in total darkness. No batteries, no switches.
- DLC/Nitron Barrel — Why it matters: Diamond-like carbon coating resists corrosion and wear better than standard bluing. Expect consistent accuracy over thousands of rounds with minimal cleaning.
- Massachusetts Compliant 10-Round Magazines — Why it matters: Ships with two 10-round mags so you can buy in restricted states without sourcing extra parts. The flush-fit design keeps the grip compact for concealed carry.
Who It’s For
The P320 Compact fits shooters who want a single do-all 9mm — one gun for daily carry, home defense, and range use. If you’re a lefty, the fully ambidextrous slide catch and reversible mag release make it a natural fit. It also works for anyone who plans to add a red dot later without buying a separate slide.
Pros & Cons
- Pro: Trigger pull is consistent and crisp at 5.5–6.5 lbs, with a short reset that speeds up follow-up shots.
- Pro: The grip texture is aggressive enough to lock in your hand under recoil but not so sharp it prints through a shirt.
- Con: The factory trigger has a bit of take-up before the wall — aftermarket triggers like an Apex or GrayGuns can clean that up if you’re a precision shooter.
- Con: The rear sight is dovetailed into the optic plate, so if you remove the plate to mount a dot, you lose the rear iron sight unless you buy a suppressor-height set.
Comparison vs. Competitors
| Feature | Sig Sauer P320 Compact | Zev Technologies OZ9 Compact | Agency Arms Syndicate |
|---|---|---|---|
| Caliber | 9mm | 9mm | 9mm |
| Barrel Length | 3.9 in | 4.0 in | 4.0 in |
| Capacity (std) | 10 rounds (MA-compliant) | 15 rounds | 15 rounds |
| Optic Ready | Yes (pre-cut) | Yes (pre-cut) | Yes (pre-cut) |
| MSRP | $564.04 | $1,099 | $1,295 |
| Grip Modularity | Full (interchangeable grip modules) | Full (interchangeable chassis) | Limited (one-piece frame) |
| Night Sights | SIGLite tritium (included) | None (aftermarket) | None (aftermarket) |
The P320 Compact costs about half what the Zev or Agency options run, yet gives you the same modularity and optic compatibility. You lose some magazine capacity out of the box, but you gain tritium sights and a proven track record — over 1 million P320s sold since 2014. For most shooters, that’s a better value.
Frequently Asked Questions
Is this the same as the standard P320 Compact?
Yes, this is the standard P320 Compact model, but it ships with two 10-round magazines for compliance in Massachusetts and other restricted states. The frame, slide, and barrel are identical to the standard 15-round version.
Can I use 15-round or 17-round magazines in this gun?
Yes. The P320 Compact grip module accepts all P320 full-size and compact magazines. If you live in a free state, you can swap in standard-capacity mags — the gun functions the same.
Does this come with the optic mounting plate?
Yes, the slide ships with a removable cover plate. You’ll need to buy the specific mounting plate for your optic (e.g., Romeo1 Pro, Delta Point Pro, RMR). Sig Sauer sells them separately.
Is the trigger safe for concealed carry?
Yes. The P320 has multiple passive safeties — a striker safety, a disconnect safety, and a sear safety — plus the trigger pull is long enough to prevent accidental discharge from holstering. The US military adopted the P320 as the M17/M18 after extensive testing.
Why Buy From Us
- ✓ Nationwide delivery (all 50 states) — we ship to your FFL
- ✓ Ships in 1–2 business days from our warehouse
- ✓ 30-day returns on unfired firearms
- ✓ Secure checkout with encrypted payment processing
Shop more semi-automatic handguns in our Semi Auto Handguns category, or check out our Concealed Carry and Sig Sauer collections.
Last updated: April 2026
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