FAB Defense Magazine Coupler for Ultimag 30R Black. By increasing your reload speed the FAB Defense Magazine Coupler for Ultimag 30R allows you to quickly switch from one magazine to another when you run out of ammo letting you get back to shooting as fast as possible. You don't have to reach into your chest rig or pocket; all you have to do is swap the mag that's already attached. Pick up the FAB Defense Magazine Coupler for Ultimag 30R today Specifications for FAB Defense Magazine Coupler for Ultimag 30R: Manufacturer: FAB Defense Additional Features: Quick and easy installation Durable and Light-Weight fiberglass reinforced polymer construction Enables setting the magazines in parallel or offset order according to individual preferences Facilitates swift magazine change Designed specifically for the Ultimag 30R Gun Model: AR-15 Condition: New Package Contents: FAB Defense Magazine Coupler for Ultimag 30R What firearm models does the manufacturer say FAB Defense Magazine Coupler for Ultimag 30R is compatible with? The manufacturer suggests that FAB Defense Magazine Coupler for Ultimag 30R is compatible with AR-15FAB Defense FX-UCB: Magazine Coupler for Ultimag 30R Black