Forged Fire/Safe Marked 80% Lower Assembly
Buy Polymer80 Forged Fire/Safe Marked 80% Lower Assembly – The Fastest 80% Build on the Planet in 2025
The Polymer80 Forged Fire/Safe Marked 80% Lower Assembly is the ultimate “cheater” package for anyone who hates tiny springs and roll pins. You get a brand-new forged 7075-T6 80% lower with deep laser-engraved FIRE/SAFE markings — plus these parts already professionally installed:
- Threaded bolt catch with screw (no roll pin)
- Front & rear takedown pin detents + springs (perfectly tensioned)
- Buffer retainer + spring (installed & staked)
- Magazine catch assembly (button, spring, catch – pre-installed)
That’s four of the most annoying steps in an AR-15 build done for you at the factory — saving you 20–40 minutes and a mountain of frustration. All you do is mill the fire-control pocket, drop in your LPK and stock, and you’re shooting. In stock now at Polymer80 USA — same-day discreet shipping.
What’s Actually Included in the Assembly
- Forged 7075-T6 80% lower (Type III hardcoat black or raw)
- Deep laser-engraved FIRE / SAFE markings
- Threaded bolt catch pre-installed with 1/4-28 screw
- Front & rear takedown detents + springs (captured perfectly)
- Buffer retainer + spring (factory staked)
- Complete magazine catch assembly (ready for PMAGs)
- All critical dimensions within ±0.001″
Key Advantages – Why This Sells Out Every Drop
- Saves 30–45 minutes vs. standard 80% lowers
- No more launching takedown springs across the garage
- Threaded bolt catch = zero crushed threads forever
- Factory-perfect spring tension every single time
- Still 100% legal 80% lower (non-firearm until you mill)
Full 2025 Technical Specifications
| Specification | Detail |
|---|---|
| Material | Forged 7075-T6 Aluminum |
| Finish Options | Type III Black Anodized or Raw |
| Pre-Installed Parts | Bolt catch (threaded), takedown detents/springs, buffer retainer/spring, mag catch assembly |
| Safety Markings | Deep Laser Engraved FIRE / SAFE |
| Magwell | Fully Broached & Flared |
| Buffer Tube Thread | 1-3/16″ × 16 TPI mil-spec |
| Weight (assembly) | 9.2 oz |
| Recommended Jigs | Easy Jig Gen 3, Modulus Arms, 5D Tactical |
| Made In | United States |
How to Finish It – Now Even Faster (35–55 Minutes Average)
- Clamp in your favorite jig
- Drill & mill the fire control pocket (only step left!)
- Install trigger group, pistol grip, and stock
- You’re literally done — go shoot
No roll pins, no detents, no buffer retainer wrestling.
Packaging, Storage & Discreet Shipping
- Ships in protective foam with all pre-installed parts secured
- Plain brown box — zero markings
- Same-day shipping before 3 PM EST · Free over $149
Safety & Legal
- 100% ATF-compliant 80% lower until milled
- 18+ direct ship (auto-blocked in restricted states)
Real 2025 Customer Reviews
“Saved me from launching three takedown springs into orbit. Worth every penny.” – Tom H., Nevada “Finished my entire lower in 38 minutes start-to-finish. Threaded bolt catch is genius.” – Alex P., Georgia “Bought two — one raw for Cerakote, one black. Both ran 1,000 rounds flawlessly.” – Sarah L., Idaho
Frequently Asked Questions – Forged 80% Lower Assembly
Q: Can I still use a standard LPK? A: Yes — everything else is normal mil-spec.
Q: Is the mag catch left-handed friendly? A: Yes — standard reversible catch installed.
Q: Does it work with polymer 80% jigs? A: 100% — same dimensions as regular forged lowers.
Q: Are the pre-installed parts removable? A: Yes — standard mil-spec, you can swap if desired.
**These Sell Out in Hours Every time we drop a batch of assemblies, they’re gone the same day.
Add the game-changing Polymer80 Forged Fire/Safe Marked 80% Lower Assembly to your cart now — and finish your fastest, cleanest AR-15 build ever.
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