The Smith & Wesson M&P15 SBR 5.56 is a short-barreled version of the M&P15, with an 11.5-inch barrel chambered in 5.56 NATO (Smith & Wesson part no. 13622). It is fitted with a BCM Gunfighter M-LOK forend, a B5 Systems SOPMOD stock and a B5 Systems P-Grip 23, a configuration that is compact without giving up usable furniture. Williams folding rear sights and an A2 flash suppressor round out the package, along with an aluminum receiver, forward assist and dust cover, and two M-LOK rail sections are included. One 30-round magazine ships with the rifle. For a short, handy 5.56 that is ready for accessories, this build from Smith & Wesson is a strong starting point.

Key Specifications

• The chambering is 5.56 NATO, the widely available service cartridge used across the AR-15 platform.
• The barrel is 11.5 inches long, which keeps the rifle short and quick to handle.
• Capacity is 30 rounds, with one 30-round magazine included.
• The forend is a BCM Gunfighter with M-LOK slots, plus two M-LOK rail sections in the box.
• The stock is a B5 Systems SOPMOD, an adjustable design that suits different shooters and carry gear.
• The grip is a B5 Systems P-Grip 23, set at a comfortable angle for the pistol-grip position.
• The rear sight is a Williams folding model, so you have backup irons while optics are mounted.
• The muzzle carries an A2 flash suppressor on a threaded barrel, which reduces visible flash.
• The safety selector is ambidextrous, so the rifle runs the same from either shoulder.
• The barrel is 4140 chrome-moly steel, a proven barrel material for AR-pattern rifles.

Frequently Asked Questions

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for short-barreled rifles. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply. Taking an SBR across state lines still requires an approved ATF Form 5320.20.

What furniture does this M&P15 SBR come with? It comes with a BCM Gunfighter M-LOK forend, a B5 Systems SOPMOD stock and a B5 Systems P-Grip 23, along with two Magpul QD sling attachments.

Does it have sights? Yes. Williams folding rear sights are fitted, and the rifle has an optics-ready top rail for a red dot or scope.

Buy the Smith & Wesson M&P15 SBR 5.56 NATO with BCM Gunfighter Forend, 11.5-Inch Barrel

As of October 9, 2026, this short-barreled rifle transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through Smith & Wesson‘s short-barrel rifle lineup and our Lubbock, Texas team will handle the transfer.