204 Ruger AR15 Upper Assembly / 204 Ruger Complete Upper Receiver for AR15

The 204 Ruger, developed by Hornaday & Ruger in 2004, offers the second highest muzzle velocity (4200fps) available on the AR15 platform.  The 204 Ruger cartridge is very accurate and efficient,producing consistent 1/2 MOA groups at 100 yards, and a 270 yard point blank range. The small caliber, light projectile, and low recoil make the 204 Ruger an ideal varmint round.

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 individually on our website.

Sort by: