The Springfield Armory Echelon 4.0FC is a full-size 9mm semi-automatic pistol with a 4-inch Melonite black barrel. It ships California-compliant with two 10-round magazines and an optics-ready slide. The slide includes a front tritium night sight and a Tactical Rack U-Dot rear sight. 
 

Key Specifications 

• Brand: Springfield Armory 
• Model: Echelon 4.0FC 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 10+1 
• Barrel Length: 4 in 
• Finish: Melonite Black 
   

Detailed Features 

• Optics-ready slide with RMR-compatible cut 
• Front tritium night sight with Tactical Rack U-Dot rear sight 
• Melonite black finish on barrel and slide 
• Ships with two 10-round magazines (California compliant) 
• California-compliant configuration

Owners of the Echelon 4.0FC generally appreciate the optics-ready slide out of the box, calling it a practical touch that saves a trip to a gunsmith. The Melonite finish gets consistent positive comments for durability in varied conditions.

The tritium front sight and U-Dot rear combination draws mixed reactions. Some shooters find the U-Dot intuitive for fast target acquisition; others prefer a standard notch-and-post and swap the rear sight early. Trigger feel is a frequent discussion point, with most rating it acceptable but not exceptional.

For California buyers the Echelon 4.0FC is one of the few full-size optics-ready options that ships compliant without modification. The 10-round capacity is the obvious trade-off, and buyers outside CA-restricted markets often choose the higher-capacity variants instead.