Hi Adam and welcome. (3) 8rd magazines are included and the listing has been corrected. Thanks for the catch. Cheers and stay safe!

you are correct it comes wit 3 8 round magazines see *****Features:
Caliber: 45 auto
******Mags included: (3) 8rd steel mag
Sights: Siglite
Threaded barrel : No
Pistol size: Full-size
Overall length: 7.7 in [196 mm]
Overall width: 1.3 in [36 mm]
Height: 5.5 in (140 mm)
Barrel length: 4.4 in (112 mm)
Weight: 30.4 oz [862 g]
Sight radius: 6.3in [160 mm]
Accessory rail: Sig rail
Trigger action: DA/SA
Trigger type: SRT
Grip type: E2
Grip color: Black
Barrel material: Carbon Steel
Frame finish: Hard Coat Anodized
Frame material: Alloy
Slide finish: Nitron
Slide material: Stainless Steel
Optic ready: No