Warne Magazine Extension for S&W M&P 9mm/40 S&W +5/+4 Black

The Warne Magazine Extension increases capacity on factory Smith & Wesson M&P magazines by 5 rounds in 9mm or 4 rounds in 40 S&W.

• Part Type: Magazine Extension
• Compatible Firearms: Smith & Wesson M&P 9mm and 40 S&W
• Capacity Increase: +5 rounds (9mm), +4 rounds (40 S&W)
• Material: Aluminum
• Finish: Black Anodized
• Installation: Drop-In
• Includes: Extension body, extension spring