R-10 Upper Receiver, Smooth Sided


R-10 Upper Receiver, Smooth Sided


Weighing 6.8 ounces, the R-10 magnesium Upper Receiver is the lightest production LR308 upper receiver on the market. For use with large caliber barrels like .308 Winchester/7.62x51mm NATO and 6.5 Creedmoor, amongst others, this upper is compatible with DPMS GEN 1 compatible lower receivers. The R-10 is a low profile upper and is designed with an enlarged ejection port to ensure reliability and a quick detach dust cover that can be removed without uninstalling the handguard and barrel nut. Protected with Tagnite and Cerakote, the R-10 Upper Receiver is the best choice for your ultra-light weight large caliber AR build.

NOTE: ROAM Upper Receivers have an enlarged barrel pin slot to fit our Barrel Pin Clip. This eliminates the risk of damaging the upper receiver while torquing the barrel nut. You must use a Barrel Pin Clip to correctly install a barrel into our Upper Receiver. Every Upper comes with a Barrel Pin Clip.


About This Product



Flat Dark Earth


6.8 ounces

Barrel Nut Thead

1 7/16"-16


Roam Magnesium


Tagnite Anodized and Cerakote

Forward Assist



DPMS GEN 1, LR .308 Components


  • Low Profile
  • CNC Machined Roam Magnesium
  • No Forward Assist
  • Enlarged Ejection Port for Increased Reliability
  • Quick Detach Glass Filled Polymer Dust Cover
  • Removable Glass Filled Polymer Brass Deflector
  • One Barrel Pin Clip Comes with Every Upper Receiver
  • Protected by TAGNITE and Finished with Cerakote