Smith & Wesson K Frame Model 64-3 Thumb Piece & Nut Stainless Steel - Old Style Used 64177B mp shield 40 Note: This is an old

Note: This is an old style recessed cylinder assembly

The model number is stamped there

Fits Smith & Wesson M&P Full Size pistols with 5" barrels:

and other K Frame square butt revolvers

Easy Installation: Direct replacement for factory front sight

Smith & Wesson K Frame Model 64-3 Thumb Piece & Nut Stainless Steel - Old Style Used 64177B mp shield 40 Note: This is an oldSmith & Wesson K Frame Model 64 3 Thumb Piece & Nut Stainless Steel Factory OEM thumb piece and nut assembly for the Smith & Wesson Model 64 3 revolver. This old style stainless steel component controls cylinder release and is essential for proper revolver operation. Specifications: Part Number: 64177B Frame: K Frame Model: 64 3 Caliber: . 38 Special Material: Stainless Steel Condition: Used Old Style Finish: Stainless Compatible Models: This thumb