Today we are in H&K's Grey Room in Virginia, taking a look at the XM-8 program. The rifle evolved form the kinetic energy carbine portion of the doomed XM29/OICW program, and eventually became the G36 rifle. In between those two, however, it was the XM-8, and it came close to adoption by the US military.The XM-8 was designed to be a very modular system, with a variety of interchangeable stocks, handguards, optics and accessories. We will take a look at all of these different elements, as well as the disassembly and mechanical function of the design.