The Franklin Armory BFSIII Libertas Lower Assembly is an AR-pattern lower receiver with a binary fire control group installed. It has a black hardcoat anodized aluminum construction and is designed for M4-compatible upper receivers. 
 

Key Specifications 

• Brand: Franklin Armory 
• Model: BFSIII Libertas 
• Action: Semi Auto 
• Color/Finish: Black Hardcoat Anodize 
   

Detailed Features 

• Binary fire control group (BFSIII) for M4-pattern rifles 
• Aluminum lower receiver with black hardcoat anodize finish 
• Libertas lower assembly configuration 
• Compatible with M4-pattern upper receivers

Owners of the Franklin Armory BFSIII Libertas lower assembly typically pick it up specifically for the binary trigger group. The binary fire control is the main draw, and most report it works as advertised in an M4-pattern build.

The black hardcoat anodize finish gets consistent marks for durability. Fit with standard mil-spec uppers is generally reported as solid, though some builders note careful fitting is worthwhile with any lower assembly.

Value opinion is split. Those who prioritize the BFSIII binary group see the Libertas package as a convenient all-in-one lower build. Others feel the premium over a standard lower plus a separately purchased trigger group is hard to justify.