Description
The Sig Sauer P320 Full Size 10 Round is the duty-length version of the modular pistol the US Army adopted as the M17. A 4.7-inch barrel, a 6.5-inch sight radius and a full-length accessory rail put it firmly in nightstand and range territory rather than concealed carry. This build ships in the reduced-capacity configuration for states that cap magazines. UPC 798681699124.
Why Go Full Size
Sight radius is the honest answer on a Sig Sauer P320 Full Size 10 Round. At 6.5 inches between the sights, small alignment errors show up as smaller misses than they would on a compact, and the longer 4.7-inch barrel squeezes a little more velocity out of the same cartridge. If the pistol is going to live in a safe, a range bag or a duty holster rather than under a shirt, there is no reason to accept the compact’s shorter sight radius.
Weight helps too, though not in the way people expect. At 28.3 ounces with a magazine the Sig Sauer P320 Full Size 10 Round is not heavy by service-pistol standards, but the mass sits further forward, which keeps the muzzle down between shots. Combined with the platform’s famously low bore axis, it tracks very flat for a polymer-framed gun.
The full-length rail on the Sig Sauer P320 Full Size 10 Round is the other practical gain. There is room for a full-size weapon light rather than a compact one, which matters more than it sounds: bigger lights mean more candela and more usable throw in a dark house.
Modular, Optic Ready, Night Sighted
The serialized component of the Sig Sauer P320 Full Size 10 Round is a modular fire control unit, a stainless chassis that lifts out of the polymer grip module. The grip is a part, not a firearm, so the same registered unit can later become a compact carry gun or an X-series competition pistol by buying components rather than another gun. That is the reason the P320 aftermarket is the deepest of any modern handgun.
The slide is cut for the P320 PRO optic footprint as standard, shared with SIG’s ROMEO sights, so a dot mounts directly with no milling and no broken Nitron finish. Optics on other footprints will need an adapter plate, which works but sits higher and changes the relationship with the irons.
SIGLITE front and rear night sights come fitted. Tritium glows unaided in a dark room, where fibre optic sights simply go black without ambient light to gather, and the vials stay useful for ten to twelve years. On a Sig Sauer P320 Full Size 10 Round intended for home defence, that redundancy behind the optic is the point.
- UPC: 798681699124, SIG P320 Full Size
- Caliber: 9mm Luger
- Barrel: 4.7 in. carbon steel with DLC coating
- Overall length: 8 in., height 5.5 in., width 1.25 in.
- Sight radius: 6.5 in.
- Weight: 28.3 oz with magazine
- Action: striker-fired, curved trigger, modular fire control unit
- Slide: stainless steel with Nitron finish, PRO optic footprint cut
- Grip module: medium full-size polymer with full-length accessory rail
- Sights: SIGLITE front and rear night sights
- Capacity: 10+1, two 10-round steel magazines included
Honest Caveats Before You Buy
Ten rounds in a full-size grip is the compromise here. The frame is sized for 17, and the ten-round magazines exist so the pistol can be sold in capacity-restricted states. In Pennsylvania there is no cap, so standard 17-round P320 magazines drop straight in and most buyers should plan on a few. If you specifically need the restricted configuration, this Sig Sauer P320 Full Size 10 Round is the one to order.
The Sig Sauer P320 Full Size 10 Round is not a carry gun. Eight inches long and five and a half tall conceals only under a proper jacket, and people who buy a full size for daily carry usually end up with a compact or a P365 within a year. Buy it for the nightstand, the range or a duty belt and it makes complete sense.
On the platform: SIG ran a Voluntary Upgrade Program for the P320 in 2017 that addressed drop safety, and current production ships with that updated trigger group. A new pistol from a dealer already has it; confirm upgrade status only when buying used privately.
Two last practical notes on the Sig Sauer P320 Full Size 10 Round. Confirm your red dot footprint before ordering, because the PRO cut is not an RMR or Holosun K pattern. And the stock striker trigger is competent rather than exceptional, with a slightly spongy break; plenty of owners never touch it, and plenty replace it, so factor that in if you are used to a tuned trigger.
Who it suits: home-defence and range shooters who want the longest sight radius and a full-length light rail, buyers in capacity-restricted states who do not want to compromise on the pistol itself, and anyone who liked the M17 and wants the civilian equivalent without a manual safety. The Sig Sauer P320 Full Size 10 Round is a lot of pistol for the money. MAG5 Firearms is a family-owned FFL in Collegeville, Pennsylvania, with transfers, cleaning and gunsmithing in-house by appointment.
Browse more handguns in stock at MAG5 Firearms, or read the manufacturer specifications on the SIG SAUER P320 Full Size page before you order.
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