Smith & Wesson M&P Shield Locking Block - 9mm/.40 All Generations - Factory OEM 422140000 j331u Function: The ejector is a

Function: The ejector is a critical action component that throws spent shells clear of the ejection port after the extractor pulls them from the chamber

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Used OEM rebound slide assembly pulled from a Smith & Wesson K Frame Model 10-3

37167 Smith & Wesson J Frame Model 37 Airweight

Smith & Wesson M&P Shield Locking Block - 9mm/.40 All Generations - Factory OEM 422140000 j331u Function: The ejector is aSmith & Wesson M&P Shield Locking Block Factory OEM Part #422140000 Genuine Smith & Wesson factory locking block for M&P Shield pistols. Critical frame component that locks the barrel and slide together during firing. Key Features: Factory OEM quality and precision Precision machined steel construction Critical for safe operation Direct replacement part Heat treated for durability Compatibility: Compatible with: M&P Shield 9mm (1. 0 & 2. 0) M&P Shield