The M4-SBR-L™ XTD complete AR-15 upper assembly features a 16" barrel chambered in 5.56 NATO, TRIUMVIR™ flash hider, FSR 15" free float slim rail system, and the Franklin Armory proprietary billet upper receiver. Franklin Armory's billet upper receiver comes in three color choices of Desert Smoke, Olive Drab Green, and Black.
*Chambered in 5.56 NATO
*16” M4 Contour Barrel
*Threaded Muzzle Crown
*Carbine Length Gas System
*Salt Bath Nitride Chamber, Bore, & Finish
*4140 Chrome Moly Steel Construction
*Low Profile Gas Block
*FSR™ 15” Rail System
*Franklin Armory™ Proprietary Billet Upper Receiver
*Machined From 7075-T6 Aluminum
*Hard Coat Type III Anodized Black, Desert Smoke, or Olive Drab Green
*Full Picatinny Rail
*MILSPEC Bolt Carrier Group
PLEASE NOTE: Color matching Desert Smoke or Olive Drab Green uppers to existing lowers is extremely difficult due to variations in the anodizing process. It is HIGHLY recommended that customers purchase matched sets from their local dealer if they intend to have a color matched upper and lower. Another option is to order a contrasting color. In fact, Franklin Armory builds some complete firearms with receivers in ODG/DS because of the favorable appearance.