Lancer tactical has added yet another great gun to their line. The M4 SD airsoft gun is a great gun for CQB play. Designed with a shortened barrel profile and a mock supressor, this makes for an interesting looking and great feeling gun. The RIS allows for the attachment of any 20mm accessories you could want, allowing the use of red dots, lights, and grips, which are all great for this CQB minded rifle. With a full metal V2 gearbox this is a great gun to get as it allows you to easily improve it in the future should you want to. Shooting at nearly 400 FPS is also great because it allows this short M4 to stay competitive in field play too.