The foundation of this all new complete 9mm upper from ODIN Works is a billet upper receiver bearing the ODIN name. On the upper is an ODIN dust cover and also new from ODIN is the XCH, eXtended Charging Handle, making charging the gun a much easier task. Inside the upper is a bolt carrier group made from case hardened 8620 steel that has black nitride coating sure to increase service life. We then add the ODIN 9mm barrel, made from 416R stainless steel. Bringing the upper all together is your choice of ODIN Works free float forends. ODIN forends are engineered from top to bottom to meet your needs. Continuous picatinny rail, QD holes, light weight, and M-LOK to choose from make this upper the total package.