The ETS Rapid Recognition System (RRS) allows you to simply and effectively differentiate your ETS Glock magazines. You can identify your caliber, load, or even personalize your magazines by simply installing the included follower and base insert. Since ETS magazines are translucent, you can quickly make out the color of the follower regardless of how many round are loaded in the mag. Like other Elite Tactical System products, the RRS is back by their lifetime warranty.

Specifications and Features:
ETS Rapid Recognition System
Easy identification
Includes 2 followers and 2 base inserts
Polymer
Blue

Fits:
ETS 17/19/26 9mm Glock magazines only (Will not fit 43)
This is not a magazine