Smith & Wesson

Smith & Wesson ranked #13 of 323 brands on GunPartPicker in September 2026, just behind B5 Systems, with about 2% of every part builders added. Up from #23 in August. Builders reached for Smith & Wesson mostly for lower receiver parts. The most added single part was the Smith & Wesson M&P15 Complete Lower 5.56x45mm/.223 Remington, Black - 812002, on top again this month.

Complete rifles were the busiest Smith & Wesson category in September: 15 products came back in stock, several more than once, and demand for them fell about 20% on August. About 55% of the 208 Smith & Wesson products we track are in stock today.

Also popular this month: Smith & Wesson Sw M&P15 Stripped Lower Receiver 5.56mm, Smith & Wesson M&P15 Sport III 5.56 NATO 16" - AR-15 Rifle, SMITH & WESSON M&P15 Sport III 5.56mm 16in 30rd Semi-Automatic Rifle (13807) and Smith & Wesson Performance Center M&P15 AXE 5.56 NATO 16.1" Barrel 30rd Semi-Auto AR-15 Style Rifle - 13986.

In GunPartPicker builds

• #33rd most added complete rifle brandTop part: M&P15 Sport III 5.56 16"
• #55th most added lower receiver brandTop part: M&P15 Complete Lower

Why Smith & Wesson

Smith & Wesson came to ARs in 2006 with the M&P15, and the first ones were built by Stag Arms under the S&W name. Long gun assembly now happens in Maryville, Tennessee, while the Springfield, Massachusetts plant still does forging and machining.

The M&P15 Sport III is the current entry rifle. It has a 16 inch 4140 steel barrel with Armornite finish, 5R rifling and a 1:8 twist, mid-length gas, a 15 inch free float M-LOK handguard, and weighs 6.52 lbs. It lists at $799 and comes without sights.

It replaced the Sport II, which had carbine gas, a 1:9 twist and iron sights. Beyond that the line runs to the M&P15T, the M&P15-22 rimfire trainer, the M&P15 pistol, and complete lowers if you'd rather build the upper yourself.

Complete S&W rifles run about $729 against roughly $918 for a typical complete rifle, third in that slot at 10%. Its lowers go the other way, about $270 against roughly $213, since most come complete. Builds on an S&W lower often add an Aero upper.

The trade-off is that it's built to a price. The barrel is 4140 rather than the 4150 used in many mil-spec barrels, it's a light pencil profile, and you'll need to budget for sights or an optic before it's ready.

We'd buy a Sport III as a first AR if you want a working rifle out of the box for under $800. If you're building from parts, an S&W lower costs more than most, so start somewhere else.