Elite Tactical Systems Carbon Smoke Series Gen 2 AR-15 Detachable Rifle Magazine w/ Coupler 5.56x45mm NATO 30 Round Clear 1 Pack Polymer. It has a built-in coupler that allows multiple mags to be connected together in seconds with no tools or extra parts. Specifications for Elite Tactical Systems Carbon Smoke Series Gen 2 AR-15 5.56x45mm NATO 30 Round Detachable Rifle Magazine w/ Coupler: Manufacturer: Elite Tactical Systems Color: Clear Fabric/Material: Polymer Magazine Capacity: 30 Round Caliber: 5.56x45mm NATO .223 Remington Gun Make: AR Platform Gun Model: AR-15 Features of Elite Tactical Systems Carbon Smoke Series Gen 2 AR-15 5.56x45mm NATO 30 Round Detachable Rifle Magazine w/ Coupler Improved feed lip geometry allows better compatibility with more receivers Over insertion tab is larger to increase mag retention Built-in coupler allows multiple mags to be connected together in seconds with no tools or extra parts No tilt follower with reliable bolt open on last round Clip on dust cover to keep dirt and debris out during storage Fast and easy disassembly for maintenance without tools via ETS Group's specially designed floor plate Ergonomically designed floorplate makes it easy to grab from mag pouches Magazine grip ribs gives you superior control Package Contents: Elite Tactical Systems Carbon Smoke Series Gen 2 AR-15 5.56x45mm NATO 30 Round Detachable Rifle Magazine w/ Coupler What firearm models does the manufacturer say Elite Tactical Systems Carbon Smoke Series Gen 2 AR-15 5.56x45mm NATO 30 Round Detachable Rifle Magazine w/ Coupler is compatible with? The manufacturer suggests that Elite Tactical Systems Carbon Smoke Series Gen 2 AR-15 5.56x45mm NATO 30 Round Detachable Rifle Magazine w/ Coupler is compatible with AR-15Elite Tactical Systems AR1530CG2-30RD: Carbon Smoke Series Gen 2 AR-15 Detachable Rifle Magazine w/ Coupler 5.56x45mm NATO 30 Round Clear 1 Pack Polymer