Daniel Defense MK18 Upper Receiver Assembly (5.56 NATO, RIS II Quad Rail)
The Daniel Defense MK18 upper receiver assembly is built around the RIS II MK18 Picatinny quad rail and a 10.5" cold hammer forged, chrome-lined barrel. This configuration uses a carbine-length direct-impingement gas system with a pinned low-profile gas block. Bolt carrier group and charging handle are not shown and are not included unless explicitly stated in the 'What is Included' section.
Featuring a Mil-Spec 7075-T6 upper receiver with M4 feed ramps and indexing marks, this MK18 upper provides full-length Picatinny mounting across the handguard with additional rail panels installed.