Smith & Wesson | Response 9mm 16.5 in | MFG# 14399

The Smith & Wesson Response is a 9mm modern sporting rifle built around the FLEXMAG system to accept a variety of double-stack 9mm pistol magazines. It features a 16.5-inch barrel, an M-LOK handguard with a full-length Picatinny-style top rail, and a Crimson Trace CMR-209 rail light. The Response is well suited to range training and pistol-caliber carbine competition. A compact, durable red-dot such as the Vortex SPARC AR pairs well and remains comfortably under $1,000.

Product Specifications

• The manufacturer is Smith & Wesson / S&W.
• The model is Response.
• The cartridge is 9mm.
• The barrel measures 16.5 inches.
• The muzzle is 1/2-28 threaded and supplied with a thread protector.
• The rate of twist is 1:10.
• The action is Semi-Automatic.
• The handguard features M-LOK slots with a top Picatinny-style rail.
• The stock material is Synthetic and the stock color is Black.
• The exterior/metal finish is listed as Black / Colored.
• The overall length is 35.37 inches (extended/collapsed configuration reported in source material).
• The design uses removable double-stack pistol magazines via the FLEXMAG system and is compatible with M&P double-stack and G17/G19 magazines (via adapters).
• Included accessories listed in source material include a Crimson Trace CMR-209 rail light and a branded carrying case.
• The UPC is 022188900705.

The Response offers a practical, adaptable platform for shooters who want the handling of a pistol-caliber carbine with broad magazine compatibility through the FLEXMAG system. Its M-LOK handguard and threaded barrel make it easy to configure for a range day or competitive PCC match, while the factory-supplied rail light aids low-light handling. The rifle’s controls and layout make it straightforward to operate and maintain, and its accessory-ready top rail and handguard simplify optic and accessory mounting.