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For years, if you wanted a short-barreled M&P15 you had to build one yourself. Smith & Wesson finally did the work for you, and the result is a genuinely well-sorted rifle. The M&P15 SBR runs an 11.5 inch barrel with a carbine-length gas system, which is the classic pairing for short ARs because it keeps dwell time where it needs to be for reliable cycling without beating up the gun. The barrel wears S&W's Armornite finish for corrosion resistance, spins a 1:7 twist that stabilizes everything from 55 grain plinking loads to heavier 77 grain match ammo, and caps off with an A2-style compensator.
This is not a stripped-down base model. Smith & Wesson fitted this one (model 13623) with a flat-face trigger, an ambidextrous Radian Raptor-LT charging handle, and an ambidextrous safety selector, upgrades most folks add to an AR after the fact. The furniture is B5 Systems through and through, with an Enhanced SOPMOD stock and Type 23 P-Grip that feel great whether you are running a plate carrier or just shooting slick. A 10.5 inch free-float M-LOK handguard gives you plenty of real estate for lights, lasers, and hand stops, and the free-float design helps accuracy since nothing is putting pressure on the barrel.
Underneath the upgrades, you get the fundamentals the M&P15 line is known for: forged 7075-T6 aluminum receivers, a forged integral trigger guard, chromed firing pin, forward assist, and dust cover. Williams folding front and rear sights come installed, so you can hit the range the day you bring it home, then add an optic whenever you are ready. At around 6.5 pounds with an overall length starting at 27.8 inches, it moves fast in tight spaces and rides easily in a truck bag or discreet case. It ships with a 30-round Magpul PMAG and accepts standard AR-15 pattern magazines, so feeding it is never a problem. For home defense, suppressed range days, or duty use, this one checks a lot of boxes without needing a single upgrade.
The 11.5 inch barrel paired with a carbine-length gas system is a time-tested combination for short AR-15s. It gives the gas system enough dwell time to cycle reliably, keeps muzzle velocity respectable for 5.56, and still trims a lot of length and weight compared to a 16 inch carbine. It is a sweet spot that plenty of professional users have relied on for decades.
It ships with one 30-round Magpul PMAG and takes any standard AR-15 pattern magazine in 5.56 NATO or .223 Remington. That means PMAGs, aluminum GI mags, Lancers, and just about everything else on the market will run in it.
This model (13623) comes nicely upgraded from the factory. You get a flat-face trigger, an ambidextrous Radian Raptor-LT charging handle, an ambidextrous safety, B5 Systems Enhanced SOPMOD stock and Type 23 grip, plus a free-float M-LOK handguard. Most of those are parts people typically buy separately, so there is very little you need to change out of the box.
Yes. The M&P15 SBR is chambered in 5.56 NATO, which safely handles both 5.56 NATO and .223 Remington ammunition. The 1:7 twist barrel also stabilizes a wide range of bullet weights, from light varmint loads up to heavy 77 grain match rounds.
| UPC | 022188891232 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 13623 |
| Action | |
| ATF Type | Short Barrel Rifle |
| Barrel Length | 10.5" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Capacity | 30 + 1 |
| Color | Black |
| Model | |
| Number of Magazines | 1 30 rd. Magpul PMAG |
| Product Type | NFA – Short Barrel Rifle |
| Safety | Safety Selector |
| Shipping Weight | 1.0 |
| Sights | Williams Folding Front & Rear |
| Sights Type | Adjustable Sights |
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