it is a Mag that will Couple (snap together) with another (of the same mags) Each of these Elite Tactical Systems magazines easily connects with one another, and disassemble quickly for cleaning and maintenance without any tools. This standard capacity magazine for the AR-15 rifle is constructed from a tough advanced translucent polymer that allows the user to gauge the number of rounds left at a glance. Each This AR-15 magazine also features a reliable no-tilt follower and keeps out dirt and debris during storage with clip-on dust covers.
Visit our AR-15 Parts and Accessories section to further customize your AR-15 with the best selection of attachments and upgrades online.
Elite Tactical Systems AR-15 Magazine Features and Specifications:
- Includes Coupler to Attach to Other Matching ETS Magazines
- Includes Clip-On Dust Cover
Caliber: 5.56 NATO/.223 Rem
Capacity: 30 Rounds
Body: Translucent Polymer
Follower: Anti-Tilt
Base Plate: Black Polymer
Fits: AR-15, M16, and M4 platforms

2 Magazines would be needed to couple together Michael. Just buy then in sets of 2 Magazines.

You would need to buy 2 of these. Instructional video on them: youtube.com/watch?time_continue=85&v=PIukItXuH2k