556 NATO AR15 Pistol Upper Assembly / 556 NATO Complete Pistol Upper for AR15

556 NATO (5.56x45) is an excellent AR15 pistol round.  It is highly lethal at close range but has wall penetration characteristics similar to pistol/shotgun rounds, making a 556 NATO AR15 pistol an ideal home defense / close quarters combat (CQC) choice.

AR15Parts.com components are sourced from top US manufacturers including Aero Precision, Anderson Manufacturing, Shaw Barrels, Swan Machine, Wilson Arms, Wilson Combat, ZRO Delta, and others. Each upper assembly has options to select Rail, Muzzle Device, Bolt Carrier Group (BCG), Charging Handle, and Magazine. Additional parts are available on our website.

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