Click to see full view
Smith & Wesson
Overview
The Smith & Wesson M&P15 Complete Lower is a fully assembled lower receiver designed for the AR-15 platform, specifically chambered in 5.56 NATO. Constructed from durable 7075-T6 aluminum and finished in black, this lower receiver provides a solid foundation for your build, ensuring compatibility with a wide range of upper receivers and accessories. This complete lower is commonly found in mid-length gas system builds, making it a versatile choice for both tactical and recreational applications.
Smith & Wesson M&P15 Complete Lower 5.56x45mm/.223 Remington, Black - 812002
Smith & Wesson M&P15 Complete Lower 5.56x45mm/.223 Remington, Black - 812002 was the second most added lower receiver on GunPartPicker in August 2026, behind the Wilson Combat AR-15 Lower Receiver Forged, with about 6% of all lower receivers added to builds. Up from #4 in June and July. Builds with this lower receiver are mostly chambered in 5.56 NATO (93%), mostly on mid-length gas (72%, then carbine-length 17%), and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 5 of the 7 retailers we track have it in stock. It dipped to $269.99 at Sportsmans Outdoor Superstore for a stretch in August 2026, well under its usual $329.99 to $339.99, so sales do come around. Buying today, the lowest price is $339.20 at Classic Firearms, above August's low of $269.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
We ranked every lower receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Lower Receiver Trends →The part most often added in each category by the 1,093 builds that include this one
Bravo Company Manufacturing 5.56 NATO Mid-Length Bhf AR-15 Barreled Upper - MCMR-15 - 16"
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Magpul AR-15 MOE Stock Collapsible Mil-Spec Black
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
EOTECH 3x30.5mm X 21.6mm Holographic Hybrid Green Dot Sight - HHSGRN
Bravo Company M16 Bolt Carrier Group Black
Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Smith & Wesson M&P15 Complete Lower 5.56x45mm/.223 Remington, Black - 812002
| Build | Parts | Total |
|---|---|---|
 | 13 | $2559.54 |
 | 5 | $757.49 |
 | 8 | $1336.18 |
| 16 | $4762.18 |
 | 12 | $5406.63 |
 | 8 | $3441.72 |
 | 27 | $2560.13 |
 | 8 | $1524.54 |
 | 11 | $1566.85 |
 | 18 | $4414.46 |
| 10 | $1584.55 |
 | 6 | $813.00 |
1 global rating
Top reviews
S and Ws M and P15 complete lower has the standard mil spec parts youd expect with their trigger guard and pistol grip. The mate to my BCM upper is tight, no rattle when shaking the rifle. The factory trigger isnt great but it functions reliably. Good base for a build.
