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.
(a) Highly ergonomic design
(b) Durable high grade polymer construction
(c) Maintains 10 cartridges limitation
(d) External coupler - does not replace magazine floor plate
Included in the kit:
1x PMC Magazine Coupler
5x Ultimag 10R Magazines