NB5821A Smith & Wesson N Frame Model 58 4" Barrel Used Part .41 Magnum k13u Stainless steel cylinder assembly with

Stainless steel cylinder assembly with new-style fluting

You should see "18" or a dash variant like "18-1"

Ensures positive magazine retention

Used OEM Part - MBU42

military collectors

NB5821A Smith & Wesson N Frame Model 58 4" Barrel Used Part .41 Magnum k13u Stainless steel cylinder assembly withNB5821A Smith & Wesson Revolver N Frame Model 58 Double Action Blue Steel 4" (Pinned) Barrel Assembly Used . 41 Magnum We sale used, new & new old stock Smith & Wesson double action revolver parts. Shoot us an email or give us a call for all your S&W Gun needs! USA Guns and Gear How to determine the model number of your Smith & Wesson Revolver. Swing out the cylinder , check behind the yoke on the frame for a MODEL NUMBER. Model numbers began in 1957