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Sig P320 / P250 9mm Full Size 21rd Magazine

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Sig P320 / P250 9mm Full Size 21rd Magazine


Availability:In stock

Ask a question (7)


Brand new! P320 / P250 full size 9mm 21rd extended length magazine.


This is an extended length magazine from Sig Sauer. It will fit and work in any P250 or p320 chambered in 9mm but there will be a gap at between the grip shell and mag extension on the SubCompact and Compact. The Carry and Full Size will fit properly and the mag's extension will meet the bottom of the grip shell.

Additional Information

UPC Code 798681555253
Caliber 9mm
Manufacturer Sig Sauer
Trigger Pull SA No
Trigger Pull (DA) No
Overall Length No
Overall Height No
Overall Width No
Sights (detailed) No
Sight Radius No
Weight Empty No
Grips No
Frame Finish No
Frame Material No
Slide Finish No
Stock Material No
Barrel Length (in) No
Rifling No
Number of Grooves No
Mag Capacity / Rounds 21rd
Number of Mags No
Sound Reduction No
Accessory Rail Not Applicable
Features No
Safety (detailed) No
Competition Approval No
Magazine Well No
Additional Info No
Bullet Type No
FFL Requirements No
Warranty Warranty provided by Sig Sauer. Warranty information is available for Sig Sauer products at

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Product Questions

I’m trying to make sure it fits the p250 40 caliber compact before I buy

Referenced product: MAG-MOD-F-9-21

The 21rd magazine will fit in the P250 .40 grip module but it is a 9mm magazine so it will not accept .40 S&W ammunition. If you have a 9mm slide and are running 9mm ammo you're fine. Full size magazines will fit in compact (and sub compact) grip modules but there will be a gap between the grip shell and the magazine floor plate / extension (in this case).

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Are these the new magazines with the "SIG" marked base plate that fits in the P320 Carry or the older "Sig Sauer" base plates? Thanks

Referenced product: MAG-MOD-F-9-21

These are the updated design floor plates and fit in the X5 and X-Carry and are marked Sig.

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I have a sig p320 carry. Will this 21rd mag work for my model as well.

Referenced product: MAG-MOD-F-9-21

The MAG-MOD-F-9-21 will work in a P320 Carry grip module.

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will thee fit Xgrip carryI'ordered tree that are on the was and wedbsite didn't specify wheteher they are older mags labeled Sog Sauer that don't fit. If they are older ones can I return them?

Referenced product: MAG-MOD-F-9-21

Response Date: Feb 7, 2019

Our mags are the updated design with the round Sig logo and they fit the X-Carry / X5 grip modules.

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Will this magazine work with the p320 x compact?

Referenced product: MAG-MOD-F-9-21

Response Date: Sep 24, 2019

This magazine will work with the X-Compact but there will be a gap between the bottom of the grip and the magazine's extended base.

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Hello, does this magazine fit the Sig P320x5 Legion?

Referenced product: MAG-MOD-F-9-21

Response Date: Mar 5, 2020

These will fit the P320 X5 Legion.

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Will it fit 9mm X5 Legion? Is it Sig brand?

Referenced product: MAG-MOD-F-9-21

Response Date: Mar 5, 2020

These will fit the P320 X5 Legion and these are Sig Sauer brand magazines.

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Write Your Own Review

You're reviewing: Sig P320 / P250 9mm Full Size 21rd Magazine

Customer Reviews

  • Great Sig Products as always
    Review by Joeon 9/2/2020
    Got 2 for my P320 Xcarry. Love them! Easy to load too not like P364 mags. I’ll definitely be buying more rom Osage County Guns.
  • Sig Quality remains consistent
    Review by Terryon 8/25/2020
    Got 2 of these for "Just in Case" for my X Compact. Perfect fit and function right out of the box! Ran the fully loaded in a loaded gun, partially loaded, upside down, variety of ammo mixed together, no hiccups, no problems, just Sig reliability!
  • Awesome
    Review by Adamon 8/12/2020
    so happy when the mags came. Fit my x5 legion perfectly. Alot of people were saying they weren't gonna fit. But the 21rd mags fit just fine
  • Great mag fits awesome
    Review by Bigdon 8/11/2020
    Top quality and works flawlessly what you would expect from sig
  • Perfect!
    Review by CJon 7/27/2020
    These magazines were everything I needed and wanted. More rounds to put down range and the excess from the mag well is aesthetically pleasing without looking too tacky “Tactical Ricky.” The purchase was smooth and shipping was insane fast. Thanks!
  • Great Mags
    Review by Oklahoma Po Poon 6/10/2020
    These are the factory 21rd mags for the p320 that used to ship with the X5. Work great.
  • Great Service
    Review by JMCon 4/26/2020
    Factory mags worked great and great price. Fast shipping, got them in 3 days from the day I ordered them.
  • Good stuff!
    Review by Sasukeon 4/5/2020
    Always a pleasure doing business! Kickass mags.
  • Great service
    Review by Cperk27on 4/5/2020
    These factory mags work great as expected. This review is more about the great service that I received from OCG. Helpful staff and fast shipping despite current events. Will be doing more business here.
  • Great magazine at a great price!
    Review by Nateon 4/1/2020
    Great magazine at a great price!
  • Beautiful!
    Review by Gilon 3/1/2020
    This magazine takes the entire 21 rounds, while only adding about 1/2" to the length of the magazine. I would recommend this magazine and this vendor to anyone wishing to have extended capacity.