The Springfield Armory Echelon 4.5F 9mm Handgun in Desert FDE (Flat Dark Earth) is a full-size, striker-fired modular service pistol.

Key Specifications

• Caliber: 9mm Luger

• Barrel: 4.5" hammer-forged steel with Melonite finish (1:10 twist rate)

• Slide: Billet-machined with Desert FDE Cerakote finish, optics-ready

• Frame: Desert FDE polymer with medium grip module (interchangeable backstraps available)

• Sights: Tritium/luminescent front sight and tactical rack U-Dot rear sight

• Dimensions: 8" overall length, 1.2" grip width, height of 5.5" (flush mag) to 6.5" (extended mag)

• Weight: 23.9 oz (with flush magazine) to 24.3 oz (with extended magazine)

• Magazines Included: Standard models typically include one 17-round flush-fit magazine and one 20-round extended magazine (variant capacities like 15-round or 10-round low-capacity also exist depending on the SKU)

  
  

Core Features

• Central Operating Group (COG): A self-contained, serialized stainless steel chassis that lets you swap grip modules while keeping the same serialized firearm.

• Variable Interface System (VIS): Uses removable pins and dual screw holes to allow direct-mounting of over 30 different red-dot optics without needing adapter plates.

• Ambidextrous Controls: Fully ambidextrous slide and magazine releases.