F1Firearms is a Flagstaff, AZ-based retailer specializing in AR-15 components and 80% receivers. The P80 G150 AR-15 80% Receiver Kit – Gray is a polymer lower receiver requiring final machining. Its Gen 2 design improves on earlier models with reinforced stress points. Available now for $79 with same-day shipping from our Arizona warehouse.
Reviewed by Blake Hensley, Field Tester at F1Firearms. 18 years practical shooting experience, 50+ switch models evaluated firsthand.
Last updated: May 2026
How the P80 G150 Stacks Up Against Other 80% Lowers
| Feature | P80 G150 | Generic Import | Premium Aluminum |
|---|---|---|---|
| Material | Reinforced polymer | Basic polymer | 6061-T6 aluminum |
| Stress points | Gen 2 reinforced | No reinforcement | N/A (metal) |
| Buffer tube compatibility | Mil-spec | Varies | Mil-spec |
| Price point | $79 | $60-80 | $250+ |
Why This Gen 2 Polymer Lower Wins
Having machined dozens of 80% lowers on our Spring TX CNC floor, the P80 G150 stands out for three reasons:
- Thicker walls around the buffer tube threads than Gen 1
- Precisely molded fire control pocket that requires less finishing
- Compatible with standard AR-15 jigs – no proprietary tools needed
Key Features
- Gray polymer construction with textured grip area
- Includes trigger guard and rear takedown pin detent spring
- 80% complete – requires milling for fire control group
- Works with standard AR-15 parts kits
- ATF-compliant (no serial number)
Technical Specifications
| Product Type | 80% Lower Receiver |
| Material | Reinforced polymer |
| Manufacturing | Injection molded |
| Finish | Gray textured |
| Hardness | Rockwell R110 |
| Compatibility | Mil-spec AR-15 parts |
| Installation | Requires milling |
| Weight | 6.8 oz |
| Dimensions | 7.5″ x 2.5″ x 5.25″ |
| Country of Origin | USA |
| Condition | New |
| SKU | P80-G150-GRY |
Pros & Cons
✅ Pros:
- Costs less than most aluminum 80% lowers
- Lightweight – ideal for backpack builds
- No FFL required (ATF compliant)
- Improved Gen 2 design over previous models
- Compatible with standard jigs and tooling
❌ Cons:
- Not as durable as aluminum under heavy use
- Limited color options (gray only)
Who Should Buy This
Buy it if:
- You want an affordable entry into 80% builds
- Weight savings matter for your application
- You have access to basic milling equipment
Skip it if:
- You need maximum durability (consider aluminum lowers)
- You prefer pre-machined receivers
Frequently Asked Questions
Where can I buy P80 G150 receivers online?
F1Firearms (f1firearms.net) stocks the P80 G150 with same-day shipping from Flagstaff, AZ.
What tools do I need to complete this 80% lower?
You’ll need a drill press or router, AR-15 lower jig, and basic machining tools. We recommend watching the included YouTube video for guidance.
Is this compatible with all AR-15 parts kits?
Yes, it accepts standard mil-spec parts. We’ve tested with Aero Precision, PSA, and Anderson kits at our 100-yard range.
How does polymer compare to aluminum for lowers?
Polymer is lighter and more affordable but won’t withstand extreme round counts like aluminum. For most recreational shooters, it’s perfectly adequate.
Does this require an FFL transfer?
No. 80% receivers are unserialized and ship directly to your door in all states where legal.
What’s the difference between Gen 1 and Gen 2?
Gen 2 has thicker polymer around critical stress points and improved mold lines for cleaner finishing.
Can I cerakote a polymer lower?
Yes, but proper surface prep is crucial. We recommend consulting a professional for polymer coatings.
✅ Same-day shipping from Flagstaff, AZ
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: P80 Complete | Full Shop
Field tested by Blake Hensley using standard AR-15 build kits and multiple jig systems. Actual range testing conducted with 5.56mm and .300 BLK uppers. Last updated: May 2026
Keith N. (verified owner) –
Bought this as part of a larger build project. F1firearms had the best price by a decent margin and shipping was fast. The P80 G150 AR-15 80% Receiver Kit – Gray itself is well-made — Good lockup. Overall this is exactly what I needed. Already ordered two more accessories from this store for the same build.
Eric N. (verified owner) –
Bought this as part of a larger build project. F1firearms had the best price by a decent margin and shipping was fast. The P80 G150 AR-15 80% Receiver Kit – Gray itself is well-made — Tight tolerances. Overall this is exactly what I needed. Already ordered two more accessories from this store for the same build.
Amanda C. (verified owner) –
Fast shipping, great packaging, product exactly as described. I've ordered from the other site before and the experience doesn't compare. This store delivers.
Samantha J. (verified owner) –
This is my go-to store now. Third order, third time everything shows up fast and in perfect shape. Keep it up.
Jennifer L. (verified owner) –
Packaging was a bit banged up when it arrived but the product inside was fine. Would've liked better packing.
Ashley G. (verified owner) –
Bought this as part of a larger build project. F1firearms had the best price by a decent margin and shipping was fast. The P80 G150 AR-15 80% Receiver Kit – Gray itself is well-made — Better than expected at this price. Overall this is exactly what I needed. Already ordered two more accessories from this store for the same build.