Franklin Armory LIBERTAS®-L Rifle – 5.56mm – 16″ Barrel – BSFIII Trigger


Free Shipping Over $250

The M4-SBR-L is Franklin Armory’s upgraded AR15 offering with a factory-installed BFSIII™ binary trigger and Franklin Armory Triumvir™ muzzle device installed on the 16″ barrel.


  • Magpul MBUS flip-up sights
  • 1:7 RH twist
  •  AR-C1 BFSIII™ trigger
  • Midlength gas system
  • Bilateral Push Button QD Mounts
  •  Triumvir™ muzzle device


The Triumvir™ muzzle device is a strategic combination of design features to better equip users of modern carbines employed in defense and CQB roles.

As a flash hider, there are three custom venturi cuts that all but eliminate the flash signature, even in short barrel configurations!

The unique venturis are machined shorter on the bottom and longer on the top. The shorter, venturi cuts allow for a reduced dust signature when shooting prone. The longer cut on top generates a compensating effect which results in a greater ability to stay on target and reduce felt recoil.

Additionally, the Triumvir™ is a high efficient linear compensator. It is designed to propel the report of the muzzle forward toward the target. Consequently, the operator will perceive a greatly reduced report. Even those standing either side of the operator, behind the plane of the muzzle, will find the peripheral report is greatly reduced. Fellow shooters at the range will appreciate the result.

Additional information

FFL Requirements and Terms

<p>All NFA Rules Apply.<br>
These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s