The 1866 model or Yellowboy, as it was famously known because of its shiny brass frame, was the successor to the Henry rifle. It features a brass frame, brass forend cap & butt plate, blued & case hardened steel parts, octagonal barrel, dovetail buckhorn rear and front blade sight and a walnut rifle style butt stock.
| Caliber | 38 Special |
| Twist | 1:18.75" |
| FireArm | yes |
| Action | Lever |
| Barrel Length | 20" |
| Barrel Length Range | 20" to 20.99" |
| Sights | Dovetail Blade Front/Dovetail Buckhorn Rear |
| Metal Finish | Blued |
| Stock Finish Group | Brown |
| Weight | 7.59 lbs |
| Stock Description | Fixed |
| Weight Range | 7 lbs to 7.99 lbs |
| Hand | Right Hand |
| Barrel Description | Octagon |
| Receiver Material | Brass |
| Metal Finish Group | Brass |
| OAL | 38.87" |
| Trigger | Standard |
| Capacity | 10+1 |
