The Franklin Armory Salus is a multi-caliber AR-pattern pistol lower receiver built around Franklin Armory's binary trigger system, which fires one round on trigger pull and a second round on trigger release. It is machined from 7075-T6 aluminum with a black hard-coat anodized finish and comes as a complete lower rather than a stripped receiver, arriving with a brace, grip, and magazine already fitted. 
 

Key Specifications 

• Brand: Franklin Armory 
• Model: Salus 
• Material: 7075-T6 Aluminum 
• Finish: Black Hard-Coat Anodized 
• Trigger System: Binary (semi-automatic and binary fire modes) 
• Configuration: Multi-Caliber Pistol Lower Receiver 
   

Detailed Features 

• Binary trigger group fires on both the pull and the release of the trigger 
• Flared magwell speeds up magazine changes 
• Ambidextrous QD sling mounts for left- or right-side carry 
• Includes a Magpul 30-round PMAG, Ergo SMBI Sure Grip, and SBM4 brace 
• Multi-caliber design accepts a range of AR-pattern pistol upper receivers

Franklin Armory lowers built around the binary trigger draw a specific crowd: shooters who want the faster split times of a binary trigger without buying a separate aftermarket trigger group. The Salus gets credit for machining quality that matches Franklin Armory's reputation, with a magwell and controls that feel finished rather than bolted on.

Feedback on the binary function itself is mixed. Some owners love how it changes the feel of rapid strings of fire, while others say it takes a session or two of practice to get used to timing the trigger release cleanly. Ammo sensitivity comes up occasionally, with a few users noting that the binary function prefers full-power factory loads over light reloads.

Buyers see the Salus as a more complete option compared to a plain stripped lower, since it already includes the brace, grip, and a magazine. Owners who wanted a bare receiver to build up themselves sometimes find the bundled parts redundant if they already own their own furniture.