FAB Defense Ultimag 10R 5 Magazines Coupler Black. These Gun Accessories are a convenient option when you're shooting because you have immeidate access to five magazines without having to grab another one from your chest rig backpack or holster. Pick up the FAB Defense Ultimag 10R 5 Magazines Coupler today Specifications for FAB Defense Ultimag 10R 5 Magazines Coupler: Manufacturer: FAB Defense Gun Model: AR-15 Package Contents: FAB Defense Ultimag 10R 5 Magazines Coupler What firearm models does the manufacturer say FAB Defense Ultimag 10R 5 Magazines Coupler is compatible with? The manufacturer suggests that FAB Defense Ultimag 10R 5 Magazines Coupler is compatible with AR-15FAB Defense FX-PMC PENTAGON MAG COUPLER BLK