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

The Warne magazine extension is designed for S&W M&P 9/40 magazines and provides additional magazine capacity in supported configurations. It adds 5 rounds for 9mm Luger magazines or 4 rounds for .40 S&W magazines, according to the supplied product description.

Made from 6061-T6 aluminum with a hardcoat anodized black finish, the extension has an ergonomic shape and finger grooves intended to support magazine insertion and removal.

Key Specifications

• The product type is a magazine extension for supported handgun magazines.
• The listed compatibility is S&W M&P 9/40 magazines.
• The 9mm Luger configuration adds 5 rounds.
• The .40 S&W configuration adds 4 rounds.
• The construction material is 6061-T6 aluminum.
• The finish is hardcoat anodized black.
• The design includes an ergonomic shape for magazine insertion.
• The extension includes finger grooves to assist with magazine removal.

With a durable aluminum construction, low-profile black finish, and configuration-specific capacity increase, this Warne extension offers a practical way to tailor supported S&W M&P magazines for range and field use.