- Series/Collection: 1866 Yellowboy
- Action: Lever
- Magazine Capacity: 10
- Caliber/Gauge: 45 Colt
- Orientation: Right
- Sight: Dovetail Flip-Up Rear, Fixed Front
- Stock Material: Walnut
- Barrel Finish: Blue
- Receiver Finish: Brass
- Barrel Length: 19"
- Overall Length: 37.87"
- Weight: 7.5 lb
- Barrel Type: Round
After Nelson King patented his new loading system his 1866 model played a prominent part in the winning of the West. The 1866 model or Yellowboy, as it was famously known because of its shiny brass frame, was the successor to the Henry rifle. Production began in 1866 and continued through 1898, a period when both rifles and carbines were introduced. The 1866 carbine features a brass frame, brass butt plate, blued & case hardened steel parts, round barrel, dovetail flip up rear sight, fixed front band sight, walnut carbine style butt stock, and a saddle ring on the left side of the frame.