Smith & Wesson M&P Housing Block without Integral Lock - 9mm 40 357 Factory OEM Part 390900000 Model 909 Improper installation can cause trigger

Improper installation can cause trigger malfunction

357 Magnum use and features a larger

40 S&W Slide

Smith & Wesson J Frame Butt Swivel Assembly - Factory OEM Replacement

Smith & Wesson M&P Housing Block without Integral Lock - 9mm 40 357 Factory OEM Part 390900000 Model 909 Improper installation can cause triggerGenuine Smith & Wesson Factory Housing Block Factory OEM sear housing block without integral lock or magazine safety for Smith & Wesson M&P pistols. This genuine S&W part ensures perfect fit and reliable performance. Key Features: Genuine OEM Part: Factory Smith & Wesson part #390900000 No Integral Lock: Housing block without internal lock mechanism No Magazine Safety: Allows firing without magazine inserted Universal Fit: Compatible with M&P 9mm, .