The only double barrel AR AEG in the market, the Classic Army DT-4 AEG is available at Gunfire and Leszek got things to say about this AEG if it is Double Pleasure or Double Trouble... "When one barrel in an airsoft replica is not enough, the Classic Army brand and their latest creation - the DT-4 Double Barrel AR carbine - come in handy. This double AR15 is a unique design that provides double firepower while maintaining the comfort of handling the classic M4 carbine. The use of a special gearbox enables simultaneous firing of both barrels, and the correct operation of the replica is ensured by the advanced electronic system of the ECS. The replica has two separate hop-up chambers that can be independently adjusted and a double magazine well. The replica is made almost entirely of metal. The pistol grip and the telescopic stock are made of polymer."