Springfield Armory Echelon 4.5F Comp 9mm, Integrally Compensated, Viridian RFX11 Reflex Sight, Four Magazines, Full-Size, Black
This Springfield Armory Echelon 4.5F Comp stands out with its integrally compensated, hammer-forged 4.5 inch barrel and the factory-installed Viridian RFX11 micro reflex sight. It uses the Echelon VIS direct-mount, pin-indexed optic interface and a removable serialized stainless-steel Central Operating Group chassis. The package includes four steel double-stack magazines and a full accessory set, offering a complete, ready-to-run kit in excellent condition.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Shows minimal prior handling. The bore is bright with a reflective, mirror-like appearance.
What’s Included
- Springfield Armory factory box with EC9459B-COMP-PAC label
- Springfield Armory range bag
- Original manual
- Cable lock
- Viridian RFX11 micro reflex sight (installed)
- VIS optics mounting accessory kits with screws and pin sets for RMR/SRO, 507C/508T, 509T plate, DeltaPoint Pro/EFLX, and Shield footprints
- Two additional interchangeable backstraps with installation pins/tools
- Springfield Armory polymer magazine loader
- 2x 20-round steel double-stack magazines
- 2x 17-round steel double-stack magazines
- Steel double-stack magazines with a mix of flush and extended base pads
The 4.5F Comp configuration features an integrally compensated barrel with a single top port to reduce muzzle rise. The barrel is hammer-forged steel, and key steel components receive a Melonite treatment. The front sight sits just behind the compensator port, paired with a U-notch rear.
Springfield’s VIS direct-mount, pin-indexed optic interface is built into the slide, and this pistol arrives with a Viridian RFX11 mounted. The slide includes wrap-over front and rear serrations with a forward indexing trench for confident manipulation, and it wears a black Melonite finish.
The serialized stainless-steel Central Operating Group chassis drops into a black polymer grip module with aggressive texture and interchangeable backstraps. Ambidextrous slide stop levers and a reversible magazine release support adaptable control. A flat-faced trigger and trigger safety round out the striker-fired action.
A 1913/Picatinny dustcover rail with five slots accommodates lights or other accessories. Capacity is 20+1 using the included 20-round magazines, with two additional 17-round magazines in the case. The frame and slide are finished in black, and the pistol is marked MADE IN CROATIA.



