Massachusetts Approved Firearms Roster: Ruger Single-Six
The Massachusetts approved firearms rosters list 23 versions of the Ruger Single-Six. Each line below is shown as the roster prints it.
Checked against the current official editions: Approved Handgun Roster, October 2026, Formal Target Shooting Firearms Roster, April 2026, Olympic Competition Firearms Roster, May 2018
| Version as listed | Caliber | Action | Roster | UPC |
|---|---|---|---|---|
| New Model Single-Six (0621) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0622) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0623) | .22 LR | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0624) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0625) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0626) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0629) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0637) | .22 LR | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0646) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0660) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0661) | 17 HMR | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0662) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0663) | 17 HMR | Revolver | Approved Handgun Roster | |
| New Model Single-Six (0665) | 17 Mach 2 | Revolver | Approved Handgun Roster | |
| New Model Single-Six (10621) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (10622) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (10623) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (10624) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (10629) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (10646) | .22 Mag. | Revolver | Approved Handgun Roster | |
| New Model Single-Six (6511) | .32 H&R | Revolver | Approved Handgun Roster | |
| New Model Single-Six (6512) | .32 H&R | Revolver | Approved Handgun Roster | |
| New Model Single-Six (8845) | .22 LR / 22 Mag. | Revolver | Approved Handgun Roster |
Specifications of the Ruger Single-Six, model 0621
- Caliber
- .22 LR and .22 WMR
- Capacity
- 6
- Barrel length
- 5.50 in
- Overall length
- 11 in
- Weight
- 33 oz
- Material
- Alloy Steel
- Sights
- Ramp front, adjustable rear
- Finish
- Blued
From the maker's page listed under Sources, checked October 28, 2026. Versions on the roster can differ in barrel length, sights and finish.
About the Ruger Single-Six
The Ruger New Model Single-Six model 0621 is a convertible single-action revolver. It is listed in .22 LR and .22 WMR and comes with an extra .22 WMR cylinder.