The Iver Johnson Arms IJ600 Lightweight is a break-open over/under shotgun chambered in .410 Gauge (also compatible with .45 LC) with a 3-inch chamber. It has a 28-inch vent rib barrel and holds 2 rounds. The receiver features engraved aluminum, finished in black. 
 

Key Specifications 

• Brand: Iver Johnson Arms 
• Model: IJ600 Lightweight 
• Caliber: .410 Gauge / .45 LC 
• Action: Break Action 
• Capacity: 2 
• Barrel Length: 28" 
• Color/Finish: Black 
   

Detailed Features 

• Over/under break-open configuration 
• 28-inch vent rib barrel 
• 3-inch chamber 
• Engraved aluminum receiver 
• Dual-caliber compatibility (.410 GA / .45 LC)

Owners of the IJ600 Lightweight appreciate its light handling for a field gun. The .410 / .45 LC dual compatibility is a frequently cited draw, making it useful both as a shotgun and for handgun-caliber loads. The 28-inch barrel gets good marks for swing and pointability on moving targets.

The engraved aluminum receiver divides opinion. Some find it adds visual appeal for the price; others feel the engraving quality is modest up close. The break-action lockup is generally reported as solid with no play when closed.

Value relative to similar over/under .410 options is where this Iver Johnson tends to win buyers over. Those looking for a lightweight, simple field gun find it fits that role well. Shooters expecting higher-end wood or metal finishing will find it falls short by that measure.