This is a factory Glock 33 .357 SIG 9-round Gen 4 magazine.

Manufactured to Glock precision specs, this Glock 33 magazine features a steel-lined body construction, an anti-tilt polymer follower, steel wire spring, and rear-facing witness holes. 

Plus, it has a drop-resistant polymer baseplate which will protect the magazine for many years of use.

Pick up a Glock 33 9-round magazine today!