it included 3 (10) round magazines

Good evening to you!! The Glock G37 Gen4 .45 GAP Pistol typically comes with the following items in the box:
GLOCK 37 Gen4 pistol
3 magazines
Magazine loader
Pistol case
Backstrap set: This set includes interchangeable backstraps, including medium and large sizes, to adjust the grip to fit individual hand sizes.
Cable lock
Cleaning set
The Gen4 models also feature:
Enlarged reversible magazine catch: Allows easy switching of the catch to the left or right side.
Dual recoil spring assembly: Reduces recoil and increases lifespan.
Rough textured frame: Enhances grip traction.
Hope this helps. Have a good rest of your 4th weekend.
🇺🇸🇺🇸'merica' 🇺🇸🇺🇸

Hi Alfred, this comes with (3) 10rd magazines.
Stay safe & have a great rest of your 4th of July weekend! 🇺🇸 🇺🇸 🇺🇸

3.

Hi Alfred and welcome. Three magazines are included with this package. Cheers and stay safe!