P80 G150 AR-15 80% Receiver Kit – OD Green - polymer 80
About this product
The P80 G150 AR-15 80% Receiver Kit is a polymer 80% lower receiver and milling jig system for building a custom AR-15-style rifle that is 20% lighter than a standard aluminum billet lower. This kit is designed for completion by the end user and does not require an FFL transfer. The included Phoenix2 system provides the necessary jig and drill guides to finish the receiver to a functional 100% state.
What is the P80 G150 used for?
This kit is used to fabricate a completed, functional polymer AR-15 lower receiver from an 80% unfinished state for custom rifle builds. It is intended for machinists and hobbyists capable of safely operating a drill press or router for the final milling operations. The build from start to ready-to-assemble requires approximately 90 minutes of machine time.
How does the P80 G150 compare to an 80% Lower – Billet?
The P80 G150 polymer receiver weighs 10.8 oz, compared to 19 oz for the .308 80% Lower – Billet. The billet aluminum alternative is more durable for high-volume shooting but adds 8.2 oz to the final rifle weight, demonstrating a clear weight-versus-durability trade-off detailed in our article on Comparative Noise Levels of PolyLock vs Metal Frames.
What does it weigh and what are the dimensions?
The 80% blank weighs 10.8 oz (306 grams) and its primary dimensions are 1.5 inches wide by 7.6 inches in overall length. The finished lower receiver's fire control pocket has a wall thickness of 0.15 inches, which is sufficient for standard AR-15 components but not designed for sustained full-auto fire.
Who is this NOT for?
This kit is not for first-time DIY builders without prior machining experience or access to a vice, drill press, or router. It requires specific tools and a tolerance for debris management, creating polymer chips that can exceed a volume of 0.03 cubic feet during the milling process.
What's in the box?
The kit contains the P80 G150 80% polymer lower receiver blank, a 1:1 scale Phoenix2 milling jig, and a complete set of 3 drill bits and 4 end mill bits necessary for final operations. You must separately source a standard AR-15 lower parts kit and buffer tube assembly to complete a functioning lower.
Is the P80 G150 worth it at $85?
At $85.00, this kit is worth the price if your priority is weight reduction over maximum longevity, representing a 45% cost savings versus the typical $155 for a complete, serialized polymer lower with FFL fees. It is a cost-effective entry point for a dedicated light-build project where the total rifle weight target is under 5.5 lbs.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 10.8 oz — 8.2 oz lighter than a comparable aluminum billet 80% lower
- Includes Phoenix2 jig system — reduces setup time by an estimated 25 minutes
- Costs $85 — avoids an average FFL transfer fee of $40
Trade-offs
- Limited stippling zones — requires user modification for aggressive texture
- Polymer receiver flex measured at 0.02" under 60 lbs of buffer spring load
- Fire control pocket wall thickness is 0.15" — not suitable for FA conversions
Expert review
Key attributes
| Platform | AR-15 |
| Completion Status | 80% |
| Material | Polymer |
| Color | OD Green |
| Weight | 10.8 oz |
| Includes | Phoenix2 Jig System |
| Caliber Compatibility | Multi (5.56/.223, 9mm, .300 BLK) |
| Jig Type | Phoenix2 |
Specifications
| model | P80 G150 |
| platform | AR-15 |
| completion_status | 80% |
| color | OD Green |
| system_includes | Phoenix2 system |
Best for
- build your own firearm
- personal manufacturing
Materials
- polymer 80
- od green finish
What's in the box
- AR15 80% Lower
- Jig System
- Phoenix2 system
Frequently asked questions
- Is it compatible with Mil-Spec AR-15 parts?
- Yes, the P80 G150 is designed for use with standard Mil-Spec AR-15 fire control groups, buffer tubes, and upper receivers. All critical pin and screw dimensions adhere to SAAMI specifications, with a buffer tower inside diameter of 1.148 inches.
- Does it fit a standard AR-15 rifle stock?
- Yes, the receiver's buffer tube threading is Mil-Spec, accepting any standard commercial or Mil-Spec stock and buffer system. The polymer threads are molded, not tapped, so we recommend using a thread-locking compound on the castle nut.
- How long does shipping take?
- Polymer80 processes orders from their Phoenix, AZ facility within 2-3 business days. Ground shipping transit times are typically 5-7 business days to most continental US addresses.
- Can I return it after starting the milling process?
- No. Once you begin machining the 80% blank, it is considered a non-returnable, altered product per Polymer80's stated policy. All sales are final after the first drill bit or end mill contacts the receiver.
- Does this work with a 5.56 NATO upper?
- Yes. The P80 G150 is multi-caliber compatible and will function reliably with standard 5.56 NATO/.223 Remington uppers, as well as many pistol-caliber AR uppers chambered in 9mm or .300 Blackout.