Description
80% Lower Receiver and Stripped Upper Receiver Set - Cerakote and Engraving Options
Build your dream AR-15 from the ground up with this premium stripped upper receiver and 80% lower receiver bundle. Machined to exacting standards from top-grade aluminum, both receivers deliver exceptional durability, reliability, and compatibility with standard AR-15 components. Customize your set by choosing from seven distinct finishes to achieve the exact look and performance you desire:
Raw Aluminum – Perfect for those who plan to apply a custom finish or admire the raw, industrial aesthetic.
Black Anodized – A timeless, MIL-SPEC–inspired coating for robust wear and corrosion resistance.
FDE Cerakote – A popular flat dark earth color that lends a tactical, modern edge.
Sniper Gray Cerakote – Clean, refined, and understated—great for creating a stealthy style.
OD Green Cerakote – Blends naturally with outdoor environments while offering a rugged, classic look.
Burnt Bronze Cerakote – A striking metallic tone that stands out with warmth and durability.
Tungsten Cerakote – A bold gray finish that merges contemporary style with tough protection.
80% Lower Receiver
80% Complete: Requires additional milling (including the fire control group area) to become a fully functional lower.
No FFL Needed: In most jurisdictions, 80% lowers can ship directly to your door—verify your local laws before purchasing or completing the receiver.
High-Quality Construction: Precision-machined to strict tolerances for consistent, reliable performance once finished.
7075 aluminum
T6 Heat treated
Magwells are flared and broached
Stripped Upper Receiver
Ready for Your Components: Add your choice of barrel, handguard, bolt carrier group, and other components for a truly tailored build.
Precision-Machined: Ensures a precise fit to the corresponding 80% lower for optimal alignment and reliability.
Compatible with Standard AR-15 Parts: Build with the aftermarket parts you prefer without hassle.
Machined from 7075 T6 Forgings
Mil-Std 1913 Rail for mounting optics and accessories
Machined for use with barrels that use an M4 barrel extension
M4 Feedramps
Made in the U.S.A
Combine the stripped upper receiver with this 80% lower receiver to kick off your next custom AR-15 project. With seven finish options available, it’s never been easier to craft a rifle that reflects your style—backed by quality manufacturing you can count on every step of the way.
RTB is offering 80% lower receivers pre-engraved with whatever serial number and manufacturer information you want. We typically engrave to a depth of .01" and you will need to fill out the following information in the text boxes above:
You can have any of the 5 lines below engraved. Pick and choose if you like, but we recommend using all of them. We recommend using all capital letters, but we will engrave exactly what you type.
1. Name of Person or Entity (This can be your personal name, trust name, etc.)
2. City & State
3. Model (This can be whatever you want) **DEFAULT PREFIX = "MOD:"
4. Caliber ("MULTI" is a good choice but you can choose whatever caliber you want) **DEFAULT PREFIX = "CAL:"
5. Serial Number (This should be unique and should not match any of the serial numbers that you currently own or have manufactured. If you add the same lower multiple times, we will continue the serial number sequence for you.). **DEFAULT PREFIX = "S/N:"
***YOU MUST SPECIFICALLY REQUEST IN THE "ORDER COMMENTS" SECTION THAT WE ARE NOT TO ENGRAVE THE DEFAULT PREFIXES IF YOU DO NOT WANT THEM.***
SKU: 80SET-RAW
SKU: 80SET-BLK
