Smith & Wesson Pistol Rear Sight Elevation Plunger Spring Multi-Model Factory New OEM - 105710000

Smith & Wesson Pistol Rear Sight Elevation Plunger Spring — Multi-Model, Factory New OEM

Part #105710000 | Factory New | 2nd & 3rd Generation Pistols | Multi-Caliber | OEM

Genuine factory new Smith & Wesson rear sight elevation plunger spring for 2nd and 3rd Generation semi-automatic pistols equipped with adjustable rear sights. The elevation plunger spring maintains tension on the elevation plunger/detent, holding the rear sight blade at the selected elevation setting. A weak or broken elevation plunger spring causes the rear sight to drift from zero under recoil or handling, making repeatable zeroing impossible.

Compatible Models

• 9mm — 2nd Generation: 439, 459, 539, 559, 639, 659
• 9mm — 3rd Generation: 3904, 3906, 3944, 3946, 5903, 5904, 5906
• 10mm — 3rd Generation: 1006
• .45 ACP — 2nd Generation: 645
• .45 ACP — 3rd Generation: 4506
• .45 ACP (verify fitment): 4516 — compact variant; confirm rear sight assembly matches before ordering

Specifications

• Part Number: 105710000
• Type: Rear Sight Elevation Plunger Spring
• Platform: 2nd & 3rd Generation S&W Semi-Auto Pistols
• Condition: Factory New
• OEM: Genuine Smith & Wesson factory part

Installation

Rear sight disassembly required to access the elevation plunger spring. Professional gunsmith installation recommended. Re-zero the rear sight after spring replacement.