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Need help determining which mags fit a P365 Fuse.

This topic can be found at:
https://sigforum.com/eve/forums/a/tpc/f/430601935/m/3570059815

January 06, 2026, 08:23 PM
Rey HRH
Need help determining which mags fit a P365 Fuse.
I don’t like the idea of Sig calling basically different guns under the same name for this reason - because parts like magazines aren’t interchangeable. And I don’t want to buy directly from Sig because their prices are high.

So when I’m looking online, how can I tell if a “P365” magazine will fit in my newly acquired Fuse? I am interested in 17 and 21 round magazines and also a 10 rounder for when I have to visit California.

Thanks in advance.


"It did not really matter what we expected from life, but rather what life expected from us. We needed to stop asking about the meaning of life, and instead to think of ourselves as those who were being questioned by life – daily and hourly. Our answer must consist not in talk and meditation, but in right action and in right conduct. Life ultimately means taking the responsibility to find the right answer to its problems and to fulfill the tasks which it constantly sets for each individual." Viktor Frankl, Man's Search for Meaning, 1946.
January 06, 2026, 08:41 PM
Chowser
Magpul is releasing mags as well so keep an eye out.

You want the X-MACRO mags which are the 17rd mags that fit the Fuse. They also make a 10-rd XMACRO mag for banned areas.

I bought the LEGION 8900844 mags from gregcotellc instead of the regular mags with the different baseplates. same price but metal baseplate for the legion mag. He has the 21rd mags in stock as well.

trust me, buy from him.


Not minority enough!
January 06, 2026, 08:46 PM
12131
17-, 21-, 25-rounders will fit.

For 10-rounder, make sure you get the one made specifically for the X-Macro. That’s all you need to know.


Q





January 06, 2026, 09:53 PM
Rey HRH
quote:
Originally posted by Chowser:
Magpul is releasing mags as well so keep an eye out.

You want the X-MACRO mags which are the 17rd mags that fit the Fuse. They also make a 10-rd XMACRO mag for banned areas.

I bought the LEGION 8900844 mags from gregcotellc instead of the regular mags with the different baseplates. same price but metal baseplate for the legion mag. He has the 21rd mags in stock as well.

trust me, buy from him.


Thank you, especially for the Greg Cote recommendation. I was trying to remember the dealers here.


"It did not really matter what we expected from life, but rather what life expected from us. We needed to stop asking about the meaning of life, and instead to think of ourselves as those who were being questioned by life – daily and hourly. Our answer must consist not in talk and meditation, but in right action and in right conduct. Life ultimately means taking the responsibility to find the right answer to its problems and to fulfill the tasks which it constantly sets for each individual." Viktor Frankl, Man's Search for Meaning, 1946.
January 08, 2026, 06:46 AM
Anubismp
Just to tag on, you can get a 365 grip with an extended dust cover (I have a Mirzon, which I love, but there are plenty of others out there) that will take the standard 365 mags as well, which works on the fuse.