Hi Sam, It will come with (3) 9mm Magazines. Gen4 and Gen5's come with 3. Other upgrades to the frame include an enlarged, reversible magazine release button and two interchangeable grip backstraps. Comes in a hard plastic case, owners manual, warranty registration card, cable lock. plastic magazine loader and spent shell casing.

3 mags What’s in the Box Glock 17 (Gen4) Pistol (3) Magazines (2) Interchangeable Back Straps Speed Loader Pistol Cleaning Set Back Strap Disassembly Tool (MBS) Cable Lock Hard Shell Case Owner’s Instruction Manual

This will come with (3) 9mm Magazines. Gen4 and Gen5's mid and Full size come with Three. Other upgrades to the frame include an enlarged, reversible magazine release button and two interchangeable grip backstraps. Comes in a hard plastic case, owners manual, warranty registration card, cable lock. plastic magazine loader and spent shell casing.

3 mags What’s in the Box
Glock 17 (Gen4) Pistol
(3) Magazines
(2) Interchangeable Back Straps
Speed Loader
Pistol Cleaning Set
Back Strap Disassembly Tool (MBS)
Cable Lock
Hard Shell Case
Owner’s Instruction Manual