The Smith & Wesson Response in 9mm Luger (brand part no. 13800) is a semi-automatic pistol-caliber rifle built around the innovative FLEXMAG system, pairing a 16.5-inch threaded barrel with a 1:10-inch twist rate. Smith & Wesson threads the muzzle 1/2×28 with a thread protector, fits a flat-face trigger with a crisp break, and mounts a handguard with M-LOK slots and a top Picatinny rail. Two interchangeable FLEXMAG magazine well adapters let the rifle run M&P double-stack or Glock 17/19-pattern magazines, and it uses an ambidextrous thumb safety. The rifle ships without sights, ready for an optic, and includes two 10-round magazines. Among AR-platform rifles in the AR rifles category, the Response favors shooters who want magazine flexibility across multiple pistol brands.

Key Specifications

• Chambered in 9mm Luger with a 1:10-inch rate of twist.
• Features a 16.5-inch threaded barrel, finished in black.
• The muzzle is threaded 1/2×28 with a thread protector.
• Feeds from M&P and Glock 17/19-pattern magazines via two FLEXMAG adapters.
• Includes a handguard with M-LOK slots and a Picatinny rail.
• Uses a flat-face trigger with a crisp break.
• Uses an ambidextrous thumb safety.
• Ships with no sights installed, ready for an optic.
• Includes two 10-round magazines.
• Overall length is 38.3 inches, weighing approximately 9 pounds.

Frequently Asked Questions

What magazines does this rifle use? M&P double-stack or Glock 17/19-pattern magazines, via two included FLEXMAG adapters.

Is the muzzle threaded? Yes, at 1/2×28, with a thread protector included.

Buy the Smith & Wesson Response 9mm Rifle

Magazine flexibility across multiple pistol brands is exactly what the Response delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.