This upper assembly is for the UM15TAC18, a sturdy all around rifle platform with multiple applications. This assembly includes a dual purpose muzzle device, that reduces recoil and signature. The 15 inch handguard features a full length picatinny rail with plenty of space for mounting scopes, sights, and optics, in addition to the Key-Mod inserts for installing lights, lasers and sling attachments. The gas block is also fully adjustable, allowing the user to tune the rifle to their ammunition preference.