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The P320 Compact has earned its place as one of the most widely carried and trusted 9mm pistols on the market, and this optic-ready variant takes that already solid foundation and gives it a clear upgrade path. The 3.9-inch carbon steel barrel features a DLC (Diamond-Like Carbon) coating for corrosion resistance and long-term durability, and the stainless steel slide wears a Nitron finish that holds up well to hard use. At 7.25 inches overall and 26.6 ounces loaded, the compact dimensions keep it manageable without sacrificing much in the way of shootability.
The slide on this model is cut with Sig's PRO optic footprint, which is natively compatible with the Sig Romeo 1 Pro and Leupold DeltaPoint Pro. Popular options like the Holosun 509T and EoTech EFLX also work with the PRO cut, some using an adapter or filler plate. The SIGLite front and rear night sights come factory installed and co-witness well if you decide to run a red dot, giving you a backup iron sight option without any additional work. It's a setup that works well on day one and stays flexible as your kit evolves.
What separates the P320 from a lot of other compacts is the serialized fire control unit at the heart of the design. That FCU is the actual firearm, and it can be moved into different grip modules or slide configurations without any gunsmith involvement. The medium compact grip module ships standard here, but the whole ecosystem of P320 parts and upgrades is wide open. The M1913 Picatinny rail up front handles lights and lasers, the controls are fully ambidextrous, and field stripping is a tool-free three-point takedown that does not require pulling the trigger. Trigger pull runs around 6.5 pounds from the factory, consistent and predictable, and the aftermarket for this platform is enormous if you ever want to change that.
Two 10-round steel magazines are included. The P320 Compact is a platform with real staying power, backed by military and law enforcement adoption around the world and a massive support ecosystem in the civilian market.
The PRO cut on this slide is natively compatible with the Sig Sauer Romeo 1 Pro and Leupold DeltaPoint Pro footprint. Options like the Holosun 509T, EoTech EFLX, and RMR-footprint optics such as the Holosun 507C can also be mounted, though some may require an adapter or filler plate for a solid, zero-retention fit. Always verify footprint compatibility before purchasing a red dot for this model.
No, this model (320C-9-BSSP-10) does not include a manual thumb safety. It relies on an internal striker safety and disconnect safety, plus a 3-point takedown safety system. Sig does offer P320 Compact variants with an optional manual safety if that is a requirement for you.
Yes. While this model ships with two 10-round steel magazines, the P320 Compact grip module is compatible with standard P320 Compact 15-round magazines as well as extended 30-round magazines from Sig Sauer. Just confirm the magazine is designed for the compact grip module size to ensure reliable feeding and a proper fit.
The Compact version pairs a 3.9-inch barrel with a compact slide and compact grip module, bringing the overall length down to 7.25 inches versus 8 inches on the full-size. The full-size ships with a 4.7-inch barrel and runs 17-round magazines in standard configuration. The Compact trades a bit of sight radius and capacity for a smaller, more manageable package while keeping the same modular FCU at its core.
It's a solid choice depending on your build and carry preference. At 7.25 inches long and just over 1.25 inches wide, it fits a strong inside-the-waistband holster without being too cumbersome for most people. The 10+1 capacity on this model and the optic-ready slide give you a well-equipped carry gun right out of the box. Those wanting something slimmer or lighter might also look at the P365, but for someone who shoots a lot and wants full-size performance in a more concealable frame, the P320 Compact is hard to argue with.
The P320 is one of the most aftermarket-supported handguns available today. Grip modules, triggers, barrels, slides, and sights are widely available from both Sig Sauer directly and third-party manufacturers. The FCU can be moved between different grip sizes and caliber configurations, making it an especially versatile platform for customization over time.
| UPC | 798681699117 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 320C-9-BSSP-10 |
| Action | |
| ATF Type | Pistol |
| Barrel Length | 3.9'' |
| Caliber/Gauge | 9mm |
| Capacity | 10+1 |
| Color | Black |
| Length | 7.25'' |
| Magazine Included | 2 x 10-Round |
| Model | |
| Number of Magazines | 2 |
| Package Height | 3.0 |
| Package Width | 10.6 |
| Product Type | Striker Fired |
| Safety | No |
| Shipping Weight | 3.3 |
| Sights | Siglite Night Sights |
| Sights Type | Night Sights |
| Slide Description | Optic Ready/Serrated |
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