Sig Sauer MPX
We list 17 Sig Sauer MPX guns, 5 in stock now from $1,899.99. Our in-stock MPX guns are chambered in 9mm, with 3.5, 4.5 and 16 inch barrels and 20 and 35 round magazines.5 Sig MPX in stock from $1,899.99. Every listing, side by side.
Prices from $1,899.99 to $2,199.99, as of Nov 13, 2026.
Pick your MPX
Every MPX line we list, with the count in stock and the lowest price for each.
All MPX guns
5 in stock. Sold out listings stay up, after the ones you can buy today.
Compare MPX models
The most listed size for each model in stock.
As of Nov 13, 2026
Compare MPX models
The most listed size for each model in stock.
| Model | Size / grip | Barrel | Standard mag | Calibers | In stock | From | Shop |
|---|---|---|---|---|---|---|---|
| MPX K | 4.5 in | 35 | 9mm | 1 | $2,199.99 | Shop | |
| Copperhead | 3.5 in | 20 | 9mm | 3 | $1,899.99 | Shop | |
| MPX | 16 in | 35 | 9mm | 1 | $2,199.99 | Shop |
Source: barrel, magazine and caliber are taken from our in-stock listings for each model.
Built for your MPX
Magazines, scope mounts and parts that fit the MPX, from Sig and other makers. Parts ship to your door where your state allows.
MPX models we stock
Our in-stock Sig MPX listings break down into the Copperhead (3), the MPX K (1) and the MPX (1). Pick a model above to see only those listings, or compare them in the table.
Calibers and sizes
In stock by caliber: 9mm (5). Barrel lengths run from 3.5 to 16 inches. Magazines hold 20 and 35 rounds. Prices run from $1,899.99 to $2,199.99.
Magazines and parts for the MPX
We have 22 in-stock accessories made for the MPX, from Sig Sauer and other makers: 8 magazines, 2 mag extensions, 3 triggers, 1 stock or brace and 5 handguards. They ship to your door where your state allows.
Buying a gun online
Magazines and most parts ship to your door where your state allows. Check state restrictions before you order, and read how buying a gun online works. Firearms can go on layaway, and financing shows at checkout when the order qualifies.
More Sig Sauer series
Sig MPX FAQ
Do you have the Sig MPX in stock?
Yes. As of Nov 13, 2026 we have 5 MPX guns in stock, from $1,899.99. Stock changes daily, and listings that sell out stay on this page.
What calibers does the Sig MPX come in?
Our in-stock MPX listings are chambered in 9mm.
Do you ship Sig MPX guns to my house?
No. A firearm bought online ships to a licensed dealer (FFL) you pick at checkout, and you fill out the transfer paperwork there. Magazines and most parts ship to your door where your state allows.
Which magazines fit the Sig MPX?
We have 8 in-stock magazines tagged for the MPX (shop them here). Magazines are made for a given caliber and action, so check the fitment line on each listing.