An unboxing and review of the affordable Cybergun COLT M4A1 CQBR AEG by Task Force Vlogs. The Cybergun Colt M4A1 CQBR can be a great choice for new airsoft players who want an M4 AEG an affordable. The CQBR stands for Close Quarters Battle Rifle, making it ideal for indoor and tight-space games. It is made primarily from high-density polymer, making it lightweight and easy to handle. The 20mm Picatinny rails and 14mm CCW male threaded barrel allow you to customize the gun with a variety of accessories, such as red dot sights, flashlights, and tracer units.