Sig Sauer Magazine For Sig P250/P320 Full Size 9mm 17 Round Black – MAG-MOD-F-9-17

This Sig Sauer magazine for the P250 and P320 Full Size in 9mm holds 17 rounds, wears a black finish, and carries part number MAG-MOD-F-9-17. Full-size duty pistols were designed around magazines like this one, and running anything less is leaving capability on the table.

Magazines are consumable equipment. They get dropped on concrete, loaded to capacity for months, and blamed for malfunctions they did not cause, which is exactly why factory quality matters.

What this Sig Sauer magazine fits

This is a factory 17 round magazine chambered for 9mm and built for the P250 and P320 Full Size frames. Those two platforms share a magazine, which is convenient for anyone who owns both or who has transitioned from one to the other.

The black finish is more than cosmetic on a magazine body. A finished exterior resists the surface corrosion that bare steel picks up from sweat and humidity, and it slides cleanly in and out of the magazine well.

Duty carriers, home defense users, competition shooters, and range shooters all need spares. The P320 in particular has become one of the most widely carried duty pistols in the country, which makes stocking magazines a practical priority.

Key features of this Sig Sauer magazine

• 17 round capacity in 9mm for the P250 and P320 Full Size platforms.
• Factory construction built to the exact tolerances the pistol was designed around.
• Black finish that resists corrosion and feeds smoothly into the magazine well.
• Steel body sized for the full-size grip module without any protrusion.
• Direct drop-in fit with no fitting, modification, or break-in period required.
• Ordered simply by part number MAG-MOD-F-9-17 for confidence at checkout.

Specifications and why they matter

Capacity of 17 rounds is what a full-size 9mm should carry, and it is the reason full-size guns still make sense for home defense and duty use despite the popularity of compacts. More rounds means fewer reloads under stress.

Platform compatibility across the P250 and P320 is a genuine convenience. The modular design of these pistols means a single magazine inventory can serve multiple guns in a household or an agency, which simplifies logistics considerably.

Feed lip geometry is the specification you never see on a spec sheet and the one that determines reliability. Factory magazines are tuned to the pistol’s timing, and this is where aftermarket alternatives most often go wrong.

Spring rate is the other invisible specification. A correctly rated spring lifts the follower fast enough to feed at speed without binding, and factory springs are matched to the capacity they were designed to carry.

Practical use, rotation, and care

Number every Sig Sauer magazine you own with a paint pen. When a malfunction happens you want to know whether it follows a specific magazine, and unmarked magazines make that impossible to track across a range session.

Rotate loaded magazines rather than leaving the same one loaded for years. Springs handle compression well but repeated full-capacity storage over long periods is harder on them than cycling, and rotation is free insurance.

Disassemble and clean the interior a few times a year. Slide the baseplate off while controlling the spring, wipe the follower and the body interior, and reassemble dry, because oil inside a magazine gathers lint and powder residue.

Inspect the feed lips after any hard drop and retire a magazine with damaged lips rather than trying to bend them back. Magazines are inexpensive and reliability is not worth gambling on. Explore more magazines and pistol components in our parts and upgrades collection.

Stock up now so a spare is always in the bag when you need it. Built by SIG Sauer, this magazine is the correct answer for a P320 or P250 Full Size. Ships direct to your door, no FFL required.