The Pentagon Magazine Coupler Kit provides a unique external coupling option for the 10 Rounds Ultimag AR magazines and is provided with five Ultimag 10R magazines.

Advantages:
Highly ergonomic design
Durable high grade polymer construction
Maintains 10 cartridges limitation
External coupler - does not replace magazine floor plate
Available in black, olive drab green or desert tan

Compatibility:
M16/M4/AR15 variants

Included in the kit:
1x OMC Magazine Coupler
2x Ultimag 10R Magazine