The foundation of this all new complete AR15 upper from ODIN Works is a forged upper receiver bearing the ODIN name. On the upper is an ODIN dust cover and also new from ODIN is the XCR, 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. The Bolt is “true” Mil Spec dimension and external surfaces are CNC ground after heat treat for a precision fit. We then add the 1 MOA guaranteed ODIN 18” 3 Gun barrel, made from 416R stainless steel, with rifle length gas and the proven 223 Wylde chamber that works with 223 and 5.56 ammo. The gas system comes standard with the ODIN adjustable gas block that features 20 clicks of adjustment, Inconel adjustment screw, and black nitride finish that will last thousands of rounds. Bringing the upper all together is the ODIN 15.5” KMod free float forend. ODIN forends are engineered from top to bottom to meet your needs. Continuous picatinny rail, QD holes, light weight, and M-LOK or KeyMod forends to choose from make this upper the total package.