S&W Revolver Bolt Plunger Spring J K L N X Frame All Models - 070200000

Smith & Wesson Bolt Plunger Spring - Universal Multi-Frame Compatibility

Genuine Smith & Wesson factory new bolt plunger spring (also known as cylinder latch spring) designed for all centerfire J, K, L, N, and X Frame revolvers with MIM (Metal Injection Molding) internal parts. This critical spring provides proper tension for reliable bolt plunger operation and cylinder lockup.

Key Features:

• Factory new OEM component - authentic Smith & Wesson quality
• Universal fit for J, K, L, N, and X Frame centerfire models with MIM parts
• Precision spring steel construction for consistent tension
• Essential for reliable cylinder lockup and rotation
• Direct replacement part - no gunsmithing required
• Ensures proper bolt engagement and smooth cylinder operation

Important Compatibility Note:

This spring is designed specifically for revolvers with MIM (Metal Injection Molding) internal parts. The year 1997 marked the major "industrial revolution" at the Springfield factory where most internal action parts—including the bolt, trigger, and hammer—were switched to MIM production. If your revolver was manufactured before 1997 or has older forged/machined parts, this spring may not be compatible. Most Smith & Wesson revolvers produced from 1997 onward use MIM parts.

Caliber Compatibility:

Factory replacement bolt plunger spring for Smith and Wesson J/K/L/N/X frame revolvers chambered in:

• .357 Magnum
• .38 Special
• .41 Rem Mag
• .44 Rem Mag
• .44 Special
• .45 ACP
• .45 Colt
• .454 Casull
• .460 S&W Magnum
• .500 S&W Magnum
• .500 Special

Frame Compatibility:

This bolt plunger spring fits all centerfire models with MIM parts across five frame sizes:

• J Frame (Centerfire Only): Models 30, 31, 32, 33, 36, 37, 38, 42, 49, 60, 331, 337, 342, 360, 442, 637, 638, 640, 642, 649
• K Frame (Centerfire Only): Models 10, 12, 13, 14, 15, 16, 19, 64, 65, 66, 67
• L Frame: Models 581, 586, 681, 686
• N Frame: Models 24, 25, 27, 28, 29, 57, 58, 624, 625, 627, 628, 629, 657
• X Frame: Models 460XVR, 500

Important Notes:

NOT compatible with:

• Revolvers manufactured before 1997 with forged/machined (non-MIM) internal parts
• Model 610 (10mm N Frame) - may require specific spring
• Rimfire models (.22 LR, .22 Magnum): J Frame Models 34, 35, 43, 63, 651 | K Frame Models 17, 18, 48, 53, 617, 648

Replace worn springs to maintain optimal revolver function and prevent cylinder timing issues.

Specifications:

• Part Number: 070200000
• Frame Compatibility: J, K, L, N, X Frame (centerfire, MIM parts)
• Condition: Factory New
• Type: Bolt Plunger Spring (Cylinder Latch Spring)
• Material: Spring Steel
• Manufacturer: Smith & Wesson
• Production: For MIM internal parts (1997-present)

Maintain your Smith & Wesson revolver's reliability with this genuine OEM bolt plunger spring. Essential for gunsmiths, armorers, and firearm enthusiasts maintaining their centerfire revolvers with MIM components.