The Beretta APX A1 Tactical 9mm, 4.8" Threaded Barrel is compatible with standard 17-round full-size (OEM ONLY) APX magazines and 21-round extended magazines, according to Beretta. It also accepts the 15-round magazines designed for the APX Compact, though these will not provide the extended capacity of the full-size magazines, according to a Reddit thread. The 21-round extended magazines are included with the pistol.
The APX A1 Tactical comes with three 21-round magazines, and the full-size 17-round magazines are also compatible. While the 21-round magazines are designed for the APX A1, the 15-round magazines for the APX Compact will also function in the Tactical model. However, it's worth noting that some users have reported issues with the spring in the 21-round magazine, according to a Reddit thread.

Hi Denny and welcome. This model only uses proprietary Beretta APX A1 Magazines: budsgunshop.com/product_info.php/products_id/33417/beretta+magazine+apx+9mm+17rd -----------------------------------budsgunshop.com/product_info.php/products_id/33401/beretta+usa+jmapx219+apx+9mm+21+rd+black+finish ----------------------------- https://gun.deals/search/apachesolr_search/082442873480 ------------------------------------- Cheers and stay safe!

Good evening to you!! The Beretta APX A1 Tactical 9mm, 4.8" Threaded Barrel, FDE, 21 Rounds is compatible with the following magazines:
Beretta APX 9mm 17-round magazines: These are standard full-size magazines for the APX series.
Beretta APX 9mm 21-round extended magazines: These magazines provide extra capacity for extended shooting sessions.
Beretta APX 9mm 15-round magazines: These are compatible with the APX A1 Compact and other APX variants.
Other factory Beretta APX magazines: The APX A1 Tactical can use any factory Beretta APX magazine chambered in 9mm. Hope this helps. Have a good rest of your day.
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