Smith & Wesson Recoil Spring Guide For:
S&W 4003TSW, 4006TSW, 4043TSW, 4046TSW, 5903TSW, 5906TSW, 5943TSW, 3906, 3946, 4003, 5903, 5903SSV, 5906, 5923, 5926, 5943, 5946
Smith & Wesson # 903370000
Factory Replacement Part From Smith & Wesson
**Please note not all parts are "drop in", some models may require fitting. As with all gun parts some installations may require disassembly and reassembly. Some parts may require installation by a qualified gunsmith.