Billet 80% Lower (Raw) - AR-15 & AR-308 – No FFL
Pros & cons
What works
- 7075-T6 aluminum construction - 20% stronger than 6061 forged lowers
- Weighs 9.8 oz raw - lighter than most billet AR-308 lowers
- Integrated trigger guard saves installation time and hardware
- Broached magwell ensures PMAG fit with 0.005-inch clearance
- No FFL required - ships directly in 3-5 business days
Trade-offs
- Raw finish requires additional $60-120 for professional anodizing
- No fire/safe markings - must be engraved separately if required
- 80% completion requires $150-300 in jig and tooling investment
- Billet machining shows tool marks more easily than forged surfaces
Video review
Expert review
Specs at a glance
About this product
The Trigger Logic Billet 80% Lower (Raw) is a precision-machined 7075-T6 aluminum receiver that works for both AR-15 and AR-308 builds without requiring an FFL transfer. This 80% lower ships in raw finish, letting you apply your preferred coating after completing the fire control group pocket and pin holes. The billet construction provides superior strength over forged receivers, with a broached magwell and threaded bolt catch for professional-grade fit.
What is the Billet 80% Lower used for?
This 80% lower is for building custom AR-15 or AR-308 rifles or pistols from scratch without FFL paperwork. The raw finish allows for custom anodizing or Cerakote after machining, while the integrated trigger guard eliminates a common installation step. With proper jig alignment and a 5/16″ end mill like our 5/16″ High Speed End Mill for Easy Jig® Gen 2, you can complete the fire control pocket in about 45 minutes of careful milling.
How does the Billet 80% Lower compare to the 80% Lower Fire/Safe Marked?
The raw billet lower offers better material strength and customization potential than the anodized Fire/Safe marked version. While the anodized lower saves finishing time, this raw 80% lower's 7075-T6 aluminum has 20% higher tensile strength than the 6061 alloy used in budget options. The billet machining also provides sharper lines and tighter tolerances than forged lowers, making it superior for precision builds where every thousandth matters.
What does it weigh and what are the dimensions?
This billet lower weighs 9.8 ounces unfinished, with overall dimensions of 7.6 inches long by 2.5 inches wide at the magwell. The fire control pocket requires milling to a depth of 0.860 inches using standard 80% jig tooling. The raw aluminum surface has a roughness average of 32 microinches as-shipped, which prepares well for either Type III hardcoat anodizing or Cerakote application.
Who is this NOT for?
This raw billet lower is not for beginners who lack machining experience or proper jig equipment. The 80% completion process requires metalworking skills and tools like our 80% AR-15 Easy Jig® Gen 1 to achieve proper pin alignment within ±0.002 inches. If you want a ready-to-assemble lower without milling, buy a complete receiver from an FFL instead.
What's in the box?
You receive one raw 80% billet lower receiver with no additional hardware or packaging. The lower includes pre-machined features like the threaded bolt catch pin hole and integrated trigger guard, but requires a separate lower parts kit like our more on .308 80% Lower and LR-308/AR-10 Lower Parts Kit to complete the build. No instructions are included—refer to our more on 80% Lower Receiver Jig Alignment Pin Specifications article for technical guidance.
Is the Billet 80% Lower worth it at $89?
At $89, this billet lower delivers excellent value for builders wanting military-grade materials without FFL hassle. The 7075-T6 aluminum construction typically costs $30-40 more than 6061 forged lowers, while providing better impact resistance and longevity. Compared to completing a transfer through an FFL ($25-50 fee plus wait time), the direct shipping and custom finish options make this a smart buy for experienced builders.
Key attributes
| Type | 80% Lower Receiver |
| Platform | AR-15 & AR-308 |
| Material | 7075-T6 aluminum |
| Weight | 9.8 oz |
| Finish | Raw |
| Magwell | Broached |
| Bolt Catch | Threaded |
| Trigger Guard | Integrated |
Specifications
| Type | 80% Lower Receiver |
| Platform | AR-15 & AR-308 |
| Magwell | Broached |
| Bolt Catch | Threaded |
| Guard | Integrated |
| FFL Required | No |
| Finish | Raw |
Best for
- Custom AR-15 build
- Custom AR-308 build
- DIY gunsmithing
- Personalized firearm creation
Materials
- Billet Aluminum
What's in the box
- Billet 80% Lower Receiver (Raw)
Care
Frequently asked questions
- Is it compatible with AR-10 upper receivers?
- Yes, this lower uses the DPMS-pattern AR-308 specification, compatible with most AR-10 uppers. The magazine well accepts .308 PMAGs and other SR-25 pattern magazines with a width clearance of 1.235 inches. Always test fit your specific upper receiver before final assembly.
- Does it fit standard AR-15 jigs?
- It works with most commercial 80% jigs including the Polymer80 Easy Jig Gen 1 and Gen 2 systems. The lower has standard mounting hole spacing of 3.125 inches center-to-center for jig alignment pins. For precise setup, follow our [80% Lower Receiver Jig Alignment Pin Specifications](/blog/80-lower-receiver-jig-alignment-pin-specifications/) guide.
- How long does shipping take?
- Standard shipping takes 3-5 business days within the continental US, with no FFL delay since it's an 80% receiver. We process orders within 24 hours during business days. Express 2-day shipping is available for an additional $18.50 for time-sensitive projects.
- Can I return it if I mess up the milling?
- No, we cannot accept returns on 80% lowers once machining has begun or the serial number area is altered. The raw finish shows tool marks easily, so practice on scrap aluminum first. If received damaged, contact support within 7 days with photos for replacement.
- Does this work with ambidextrous safety selectors?
- Yes, the safety selector hole is precision-reamed to 0.250 inches diameter for standard ambi safety parts. The left-side clearance is machined to accommodate popular designs like the Radian Talon or Battle Arms Development selectors without modification.