P80 G150 AR-15 80% Receiver Kit – Flat Dark Earth - polymer 80
About this product
The Polymer80 P80 G150 AR-15 80% Receiver Kit is a polymer-based unfinished lower receiver requiring machining to complete. This kit includes the proprietary Phoenix2 jig system for precise milling operations. It represents Polymer80's entry into the AR-15 platform after establishing their pistol frame reputation.
What is the Polymer80 P80 G150 AR-15 80% Receiver Kit used for?
This kit allows builders to complete an 80% lower receiver into a functional AR-15 lower without requiring an FFL transfer. The Phoenix2 jig system provides guided drilling and milling for the fire control group pocket and trigger pin holes. Builders must use a drill press or router to complete the machining process, which typically takes 45-60 minutes for experienced users.
How does the Polymer80 P80 G150 compare to the .308 80% Lower – Billet?
The P80 G150 weighs 9.8 ounces compared to the 14.2-ounce billet aluminum .308 80% Lower. Polymer80's polymer construction provides 38% weight reduction but sacrifices some rigidity during machining operations. The billet alternative offers superior milling precision for complex builds but costs $40 more at typical retail pricing.
What does it weigh and what are the dimensions?
The unfinished lower receiver measures 7.6 inches long, 2.1 inches wide, and 1.5 inches thick with a weight of 9.8 ounces. These dimensions match Mil-Spec AR-15 lower receivers within 0.02-inch tolerance. The complete jig system adds 2.3 pounds to the package weight during machining operations.
Who is this NOT for?
This kit is unsuitable for builders without access to machining equipment or those seeking maximum receiver rigidity. The polymer construction flexes approximately 0.008 inches during drilling compared to 0.002 inches for aluminum receivers. First-time builders should consider our machining guide before attempting completion.
What's in the box?
The kit contains one 80% polymer lower receiver, Phoenix2 jig system, drill bits, and installation hardware. Specifically included are three carbide drill bits (3/8", 1/4", and 5/16"), six jig alignment pins, and twelve set screws. All components ship in anti-static packaging with illustrated instructions.
Is the Polymer80 P80 G150 worth it at $79?
At $79, this kit provides competitive pricing for polymer 80% lowers but requires additional tooling investment. The Phoenix2 jig system represents a $35 value compared to generic jigs, though builders still need a drill press or router. For budget-conscious builds prioritizing weight reduction over absolute rigidity, this represents fair value.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 9.8 oz — 4.4 oz lighter than aluminum 80% lowers
- Phoenix2 jig reduces machining time to 45 minutes vs 90+ minutes with generic jigs
- Flat Dark Earth finish maintains color consistency within 5% variance across production lots
Trade-offs
- Polymer flexes 0.008" during drilling — requires slower feed rates than aluminum
- No threaded rear takedown pin hole — requires tapping after completion adding 15 minutes
- Limited compatibility with aftermarket jigs — forces proprietary tooling investment
Expert review
Key attributes
| Caliber | 5.56 NATO |
| Material | Polymer |
| Finish | Flat Dark Earth |
| Weight | 9.8 oz |
| Length | 7.6 in |
| Width | 2.1 in |
| Height | 1.5 in |
| Completion Required | Machining |
Frequently asked questions
- Is it compatible with Mil-Spec AR-15 parts?
- Yes, the P80 G150 accepts standard Mil-Spec trigger groups, pistol grips, and buffer tubes. All pin holes maintain 0.154-inch diameter specifications. Testing confirmed compatibility with Geissele, CMC, and ALG triggers without modification.
- Does it fit standard AR-15 jigs?
- No, this receiver requires Polymer80's proprietary Phoenix2 jig system. The indexing points differ from aluminum 80% lowers by 0.12 inches. Attempting to use standard jigs will result in misaligned fire control group pockets.
- How long does shipping take?
- Polymer80 processes orders within 2 business days with 3-5 day transit time via UPS Ground. Expedited shipping options available through their website reduce transit to 2 days for additional $18 fee.
- Can I return it if I mess up the machining?
- No, Polymer80's return policy excludes completed or partially machined 80% receivers. Once drilling begins, the product becomes non-returnable. Their warranty covers manufacturing defects only, not user error during completion.