This Warne magazine base extension (part no. MESW0BLK) is built for the Smith & Wesson M&P in 9mm/.40 S&W. It’s a +0 design — it doesn’t add capacity, instead adding a finger groove for a more secure grip on the magazine during reloads.

Key Specifications

• Built for the Smith & Wesson M&P in 9mm/.40 S&W.
• A +0 extension — adds no rounds, only extends the grip surface.
• Machined from 6061 T6 aluminum billet.
• Finger groove for easier grasping during magazine changes.
• Secured with a Torx-head screw and washer.
• Type 2 hardcoat anodized finish.
• Finished in black.

Frequently Asked Questions

Does this extension add capacity? No — this is a +0 extension. It extends the grip/finger surface without adding rounds.

What pistol does this fit? The Smith & Wesson M&P in 9mm or .40 S&W.

Buy the Warne +0 Magazine Extension for S&W M&P

Order it from our Lubbock, Texas gun shop for fast shipping direct to your door. Browse our full handgun magazines selection.