FRANKLIN ARMORY® 14.5" M4-SBR-L™ Billet Upper Assembly

FRANKLIN ARMORY® 14.5" M4-SBR-L™ Billet Upper Assembly




Franklin Armory® is proud to produce 100% American made quality firearms. The M4-SBR-L™ complete AR-15 upper assembly features a 14.5" barrel chambered in 5.56 NATO, pinned and welded flash hider, FSR 13" 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. 


Barrel Length + Type

14.5" M4 Contour Barrel


13" FSR™


Optic Ready


1:7” RH

Charging handle


Bolt Carrier

Salt Bath Nitride


Gas System

Carbine Length

Gas Block

Low Profile

Muzzle Device

Triumvir™ Pinned and Welded


Billet Upper Receiver


Black, ODG, DS


5.56 NATO (1:9") RH Twist


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.

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LUKE 22:36 "But now if you have a purse, take it, and also a bag; and if you don't have a sword, sell your cloak and buy one".


⚠️WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to -