M
mapellinat_oifSolid foundation for my build
Reviewed on April 25, 2026
Great billet lower from SilencerCo. The machining is excellent, and it provided a very stable platform for my 5.56 build. No issues during assembly at all. Looks great too.
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Silencerco AR-15 Billet Lower Receiver
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SilencerCo
Overview
The SilencerCo AR-15 Billet Lower Receiver is a stripped lower designed specifically for the AR-15 platform, crafted from high-quality billet aluminum with a hardcoat anodized finish in black. This lower receiver is suitable for the 5.56 NATO caliber, providing a solid foundation for your build while enhancing the overall aesthetics and rigidity of the firearm. Commonly found in builds featuring a mid-length gas system, it offers versatility for various shooting applications.
Specifications
MPNSU4766
ColorBlack
Material7075-T6 Aluminum
AssemblyComplete
FinishHardcoat Anodized
Caliber5.56 NATO
StyleBillet
PlatformAR-15
Available Merchants(6)
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September 2026 on GunPartPicker
Silencerco AR-15 Billet Lower Receiver ranked #166 of the 477 lower receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since January 2026. All time, it ranks #138 of the 1,088 lower receivers builders have added. Builds with this lower receiver are split between 5.56 NATO (56%) and .223 Wylde (22%), split between mid-length (34%) and carbine-length (26%) gas systems, and nearly all AR-15.
It was out of stock everywhere we track for all of September 2026, and today none of the 6 retailers we track has it in stock right now. Listed prices start at $269 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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We ranked every lower receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Lower Receiver Trends →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
SilencerCo SCO15, Stripped Upper Receiver, .223 Remington/556NATO, Black
Upper Receiver$219 · out of stockin 14% of them
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Trigger$335in 9% of them
Radian Weapons AR-15 Raptor/talon L/s Combo Black Anodized
Charging Handle$135in 12% of them
Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011
Stock & Brace$88in 4% of them
Bravo Company M16 Bolt Carrier Group Black
Bolt Carrier Group$199in 6% of them
Aero Precision 5.56 Mid-Length AR-15 Barrel - Pinned Epsilon SL - 14.5"
Barrelin 3% of them
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
56.4%
5.56 NATO56.4%
.223 Wylde21.8%
300 Blackout18.2%
6mm ARC3.6%
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
34.2%
Mid-Length34.2%
Carbine26.3%
Pistol26.3%
Rifle13.2%
Builds Featuring This Part
See all 8 →Builds in the community that include the Silencerco Ar-15 Billet Lower Receiver
| Build | Parts | Total |
|---|---|---|
 | 13 | $2678.04 |
| 20 | $2499.18 |
 | 14 | $1242.00 |
 | 16 | $2737.91 |
| 12 | $1648.58 |
 | 19 | $1351.89 |
 | 9 | $986.42 |
 | 17 | $1416.09 |
Customer reviews
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1 global rating
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