Maximize your firepower and reduce reload time with the F.A.B. Ultimag OMC Opposite Dual Magazine Coupler Kit. Constructed of premium reinforced polymer, this external magazine coupler kit allows you to attach 2 AR magazines to one another for quick reloading and optimal firepower. Manufacturer model #: FX-OMCK. Premium polymer construction External coupler (does not replace magazine floor plate) Attaches 2 AR magazines on opposite ends Reduces reload time Compatible with most AR magazines