Smith & Wesson Model 4043 Pistol Side Plate Assembly .40 S&W DAO Stainless Steel Used OEM Part 4043U

This is a used OEM side plate assembly for the Smith & Wesson Model 4043 semi-automatic pistol chambered in .40 S&W. This is a genuine factory part in stainless steel construction designed for DAO (double-action-only) operation from a third-generation Smith & Wesson pistol.

Key Features:

• Genuine Smith & Wesson factory part
• Stainless steel construction
• Complete side plate assembly
• DAO (double-action-only) configuration
• Compatible with Model 4043 .40 S&W pistols
• Used condition - fully functional OEM component
• Part Number: 4043U

Compatibility:
This side plate assembly is designed specifically for the Smith & Wesson Model 4043, a third-generation .40 S&W pistol with double-action-only operation. The Model 4043 is a variant of the 4006 series with a DAO trigger system for consistent trigger pull on every shot. The four-digit model number indicates this is a 3rd generation pistol: the first digit (4) indicates .40 S&W caliber, the second digit (0) indicates alloy frame, and the third digit (4) indicates DAO trigger configuration. The side plate covers and protects the internal fire control components on the left side of the frame.

About the Model 4043:
The Smith & Wesson Model 4043 is a third-generation semi-automatic pistol introduced in the late 1980s/early 1990s. It features a DAO trigger system preferred by many law enforcement agencies for its consistent trigger pull and enhanced safety. The .40 S&W caliber offers a balance between 9mm capacity and .45 ACP stopping power. Parts for these third-generation pistols are becoming increasingly difficult to find.

Condition:
This is a used factory part removed from a Smith & Wesson Model 4043 pistol. The side plate assembly has been inspected and is in good working condition with normal wear consistent with use. The stainless steel finish shows typical handling marks. Used parts offer an economical solution for repairs and restorations while maintaining OEM quality and fit.

Installation:
Professional gunsmith installation is recommended for proper fitting and function. The side plate requires careful installation to ensure proper alignment and protection of internal components. Knowledge of Smith & Wesson semi-automatic pistol mechanisms is helpful for installation.