What is bushmaster xm-15 dissipator?

The Bushmaster XM-15 Dissipator is a type of AR-15 rifle that features a unique barrel design. The barrel is 16 inches long, but has a mid-length gas system that extends the distance between the gas port and the front sight. This design helps to dissipate heat and reduces the potential for barrel failure due to overheating. The Dissipator also has a dual-spring, flat-top upper receiver with Picatinny rail for easy optics mounting and a six-position telescoping stock. It is often used for medium to long-range shooting and is popular among casual and professional shooters alike.