Description
This is the configuration the P320 was designed around. The Sig Sauer P320 Full Size 17 Round gives you a 4.7-inch barrel, a 6.5-inch sight radius, a full-length light rail and seventeen rounds in the grip, all on a chassis that can be rebuilt into a different pistol later. At 622.99 dollars it is one of the better value full-size duty guns on the shelf. UPC 798681697458.
Seventeen Rounds and a Long Sight Radius
Capacity and sight radius are what a full-size frame buys, and the Sig Sauer P320 Full Size 17 Round delivers both without weighing much. Twenty-eight point three ounces with a magazine in is light for a gun this size, because the frame is a polymer grip module wrapped around a small stainless chassis rather than a solid block of metal.
The 6.5 inches between the sights on a Sig Sauer P320 Full Size 17 Round is the part shooters underrate. A longer sight radius makes alignment errors more visible, which sounds like a disadvantage and is the opposite: you can see and correct what a shorter gun would hide. Paired with a 4.7-inch barrel and the platform’s low bore axis, the pistol tracks flat and returns predictably.
The Sig Sauer P320 Full Size 17 Round grip module takes a full-length accessory rail, which means a full-size weapon light rather than a compact one. That is worth more than the spec line suggests, because larger lights push more candela and throw usable light further down a hallway.
One Serial Number, Several Pistols
The registered part of this gun is a modular fire control unit: a stainless chassis about the size of a matchbox that lifts out of the grip module. Everything else, grip, slide, barrel, is a component. Buy a Sig Sauer P320 Full Size 17 Round now and you can build it into a compact carry gun, an X-series competition pistol or an M17 clone later by buying parts rather than another firearm and another background check.
That design is the reason the US Army adopted the platform as the M17 and M18, and why the P320 aftermarket is deeper than any other modern handgun. Grip modules come in three sizes and a dozen textures, slides in three lengths, and triggers and barrels from a long list of makers, all fitting the same chassis.
Sighting on the Sig Sauer P320 Full Size 17 Round is handled twice. The slide is cut for the P320 PRO optic footprint so a ROMEO or compatible dot mounts directly, and SIGLITE front and rear night sights sit underneath as a backup that needs no battery. Tritium glows on its own in a dark room, where fibre optic sights need ambient light and go black without it.
- UPC: 798681697458, 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: 17+1, two 17-round steel magazines included
Honest Caveats Before You Buy
Check your state first. Seventeen-round magazines are restricted in several states, and if you live in one of them the ten-round build of this same pistol is the one to order. Pennsylvania has no cap, so the Sig Sauer P320 Full Size 17 Round is the correct choice here and the ten-round version would just be paying the same money for less.
The Sig Sauer P320 Full Size 17 Round is a big pistol and not a carry gun. Eight inches long and five and a half tall is nightstand, range bag and duty belt territory. People do carry full-size P320s, but it takes a serious belt, a good holster and a wardrobe that cooperates.
On the platform: SIG ran a Voluntary Upgrade Program for the P320 in 2017 addressing drop safety, and current production ships with the updated trigger group. A new pistol from a dealer already has it. Only confirm upgrade status if you are buying a used example privately.
Two last things. Confirm your optic footprint before ordering a dot, because the PRO cut is not an RMR or Holosun K pattern and an adapter plate raises the sight and spoils the co-witness. And the factory striker trigger on a Sig Sauer P320 Full Size 17 Round is competent rather than exceptional, with a slightly spongy break, so budget for a replacement if you are coming from something tuned.
Who it suits: home-defence users who want maximum capacity, sight radius and light rail for the money, competitors who want a base gun to build on, and anyone who wants one serial number that can become several different pistols. The Sig Sauer P320 Full Size 17 Round is the configuration most buyers should start with. 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.
Reviews
There are no reviews yet.