This is the 17 round Glock standard factory 9mm Gen 5 magazine for the Gen 5 Glock 17.
Updated with a revised red follower, subtle geometry improvements and a more securely locking baseplate.
It does of course feature the standard Glock magazine full length steel inner frame incased in tough polymer with rear facing witness holes for round counting.
Flush fit on the Glock 17 it will also fit compact and sub compact models as an extended magazine.
Please note: will not fit earlier generation Glocks e.g. Gen 2, Gen 3 and Gen 4.