The Springfield Armory Echelon 4.0C Comp is a compact, striker-fired handgun chambered in 9mm, running a 4-inch barrel with a single-port comp built into the slide and barrel to help tame muzzle flip. This Gear Pac bundle pairs the pistol with a Viridian RFX-11 optic already mounted, plus a set of four spare magazines and a carry case. The frame swaps between backstraps and every control is ambidextrous. 
 

Key Specifications 

• Brand: Springfield Armory 
• Model: Echelon 4.0C Comp 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 15+1 
• Barrel Length: 4 inches 
• Finish: Blue/Black 
   

Detailed Features 

• The slide and barrel share a built-in single-port comp, cut to keep the dot or sights flatter across strings of fire. 
• A Viridian RFX-11 green dot ships already fitted to the optic-ready slide. 
• Four spare magazines and a carry case round out the Gear Pac bundle for a ready-to-shoot setup. 
• Backstraps swap out and every control runs ambidextrous, so the grip fits a range of hand sizes. 
• The trigger is a striker-fired design tuned for a consistent pull shot to shot.

Owners of the Echelon line generally report smooth, reliable cycling with quality ammunition, and the compact 4.0C variant is seen as carrying the full-size gun's build quality into a smaller footprint. Some early adopters mention that spare parts and holster options were more limited than for longer-established platforms when the line was newer.

The interchangeable backstraps and ambidextrous controls get praised for fitting a wide range of hand sizes, and shooters note the built-in compensator helps keep the sight picture flatter during rapid strings of fire. A few owners mention the comped slide adds a bit more muzzle blast and flash than an unported gun.

Bundled Gear Pac packages like this one appeal to buyers who want an optic-ready pistol without shopping separately for a red dot and extra magazines, and most consider the included Viridian RFX-11 a reasonable head start over buying components individually.