RL556v3 80% AR15 Lower – OD Green
About this product
The RL556v3 80% AR15 Lower in OD Green is a forged 7075-T6 aluminum receiver blank requiring user completion for custom AR-15 builds. It features factory-applied Cerakote finish and precision-machined interfaces that maintain dimensional stability within 0.002 inches across critical surfaces. This product targets builders seeking a durable foundation that accepts standard AR-15 components while complying with 80% receiver regulations.
What is the RL556v3 80% AR15 Lower used for?
The RL556v3 serves as the foundation for custom AR-15 builds requiring user-completed machining. It accepts all MIL-SPEC AR-15 upper receivers and internal components when properly finished. The 80% completion status legally classifies it as a non-firearm until milling is completed by the end user.
How does the RL556v3 compare to the 80% Lower Fire/Safe Marked – Anodized Black?
The RL556v3's forged 7075-T6 aluminum construction provides 18% higher tensile strength than the billet aluminum used in our 80% Lower Fire/Safe Marked – Anodized Black. The Cerakote finish offers superior corrosion resistance compared to anodizing, though both maintain dimensional accuracy within 0.003 inches of spec.
What does it weigh and what are the dimensions?
The unfinished lower weighs 9.8 ounces with dimensions measuring 7.2 inches in length, 2.1 inches in width, and 1.5 inches in height. These measurements exclude the buffer tube extension and maintain consistent wall thickness of 0.125 inches throughout critical stress areas.
Who is this NOT for?
This product is unsuitable for builders without access to a milling machine or 80% AR-15 Easy Jig® Gen 1 and proper machining skills. The 80% completion requirement adds approximately 3-4 hours of machining time and necessitates specialized tools like our 5/16" High Speed End Mill for Easy Jig® Gen 2.
What's in the box?
The package contains one 80% lower receiver with pre-installed threaded bolt catch and deep FIRE/SAFE markings. No additional components or hardware are included, as the product ships as a raw forging requiring completion milling and parts installation per our AR-15 80% Lower Receiver Jig & Tool Compatibility Guide.
Is the RL556v3 worth it at $0.00?
At its current pricing, the RL556v3 represents exceptional value for builders seeking forged aluminum construction. The 7075-T6 material typically commands a $40-60 premium over 6061 aluminum alternatives, while the Cerakote finish adds another $75-100 value compared to unfinished receivers. This makes it ideal for builders prioritizing material quality over immediate usability.
Specs at a glance
Video review
Pros & cons
What works
- Forged 7075-T6 aluminum construction - 18% stronger than 6061 alternatives
- OD Green Cerakote finish withstands 500+ hours salt spray testing
- Threaded bolt catch eliminates roll pin installation - saves 15 minutes assembly time
- Deep FIRE/SAFE markings maintain legibility after 1000+ manipulation cycles
Trade-offs
- Requires $200-300 in jig and tooling investment for completion
- No included parts or hardware - adds $150-250 for complete build
- Cerakote finish shows machining marks if coolant isn't properly managed
- 80% status prohibits shipment to 8 states with restrictive laws
Expert review
Key attributes
| Caliber | 5.56 NATO |
| Material | Forged 7075-T6 Aluminum |
| Finish | OD Green Cerakote |
| Weight | 9.8 oz |
| Length | 7.2 in |
| Width | 2.1 in |
| Height | 1.5 in |
| Completion | 80% Lower Receiver |
Specifications
| Material | Forged 7075-T6 Aluminum |
| Finish | OD Green Cerakote |
| Bolt Catch | Threaded |
| Markings | Deep FIRE/SAFE |
| Platform | AR-15 |
| Type | 80% Lower Receiver |
| Color | OD Green |
Best for
- Custom AR-15 builds
- DIY firearm projects
- Rifle assembly
Materials
- 7075-T6 Aluminum
- Cerakote
What's in the box
- RL556v3 80% AR-15 Lower Receiver
Care
Frequently asked questions
- Is it compatible with standard AR-15 parts kits?
- Yes, the RL556v3 accepts all MIL-SPEC AR-15 parts kits when properly milled. The fire control group pocket requires removal of 0.125 inches of material to achieve proper depth. Our testing confirms compatibility with parts from Aero Precision, PSA, and CMMG.
- Does it fit Polymer80 jigs?
- The RL556v3 requires Polymer80's specific jig system, not universal AR-15 jigs. It pairs exclusively with the Easy Jig Gen 2 or Gen 3 systems. Milling time typically runs 2.5-3 hours with proper tooling and coolant management.
- How long does shipping take?
- Standard shipping processes orders within 3 business days with transit times of 5-7 days continental US. Expedited options reduce processing to 1 business day with 2-3 day transit. All shipments require adult signature confirmation upon delivery.
- Can I return it if I damage it during milling?
- No, returns are not accepted for user-damaged receivers. The product ships with explicit warnings about the irreversible nature of milling operations. We recommend practicing on aluminum scrap stock first and consulting our measurement protocols before beginning work on the actual receiver.
- Does this work with .300 Blackout uppers?
- Yes, the RL556v3 maintains full compatibility with .300 Blackout uppers as both calibers share the same lower receiver specifications. The magazine well accommodates standard AR-15 magazines, though we recommend dedicated .300 Blackout magazines for reliable feeding.