80% Lower Patriot Pack
About this product
What is the 80% Lower Patriot Pack? The FrameSmith 80% Lower Patriot Pack is a complete AR-15 build kit containing a polymer 80% lower receiver, Gen 3 Easy Jig, premium drill bits, and end mill for legally finishing your firearm. This package eliminates sourcing individual components and ensures tool compatibility from the start. It ships same-day when ordered before 3 PM EST.
What is the 80% Lower Patriot Pack used for?
The Patriot Pack provides all tools and components needed to legally mill and finish an AR-15 lower receiver in approximately 2-3 hours. It includes a polymer 80% lower blank, Gen 3 jig, 5/16" end mill, and three drill bits sized for fire control group pin holes. This eliminates compatibility guesswork between jigs and lowers from different manufacturers.
How does the 80% Lower Patriot Pack compare to the Polymer80 PF940V2?
The FrameSmith kit offers integrated tool compatibility where the Polymer80 PF940V2 requires separate jig purchase. Our end mill removes material at 1.2 cubic inches per minute versus Polymer80's stock tool at 0.8 inches. The FrameSmith jig provides ±0.003" positioning accuracy compared to ±0.005" on Gen 2 jigs.
What does it weigh and what are the dimensions?
The complete kit weighs 3.2 pounds with shipping dimensions of 12"×8"×4". The polymer lower itself measures 7.5" long × 2.1" wide × 1.5" high and weighs 6.8 ounces unfinished. The Gen 3 jig adds 1.4 pounds to the total package weight.
Who is this NOT for?
This kit is not for builders seeking aluminum lowers like our .308 80% Lower – Billet. Polymer has 40% lower tensile strength than aluminum and shows more flex under heavy use. Choose aluminum if you need maximum durability for high-round-count builds.
What's in the box?
The box contains one polymer 80% lower receiver, one Gen 3 Easy Jig, one 5/16" carbide end mill, three drill bits (3/8", 5/16", 1/4"), and installation hardware. The end mill handles approximately 15-20 lowers before needing replacement based on our milling tests.
Is the 80% Lower Patriot Pack worth it at $222.99?
At $222.99, the kit saves $47 versus buying components separately. The jig alone retails for $149, lower for $79, and tools for $42. The time savings from guaranteed compatibility justifies the price for first-time builders who value precision.
Specs at a glance
Video review
Pros & cons
What works
- Complete kit saves $47 versus separate purchases
- Gen 3 jig provides ±0.003" positioning accuracy
- End mill removes 1.2 cubic inches per minute
- Same-day shipping before 3 PM EST
Trade-offs
- Polymer lower weighs 6.8 oz - 3.2 oz heavier than aluminum
- End mill lasts 15-20 uses versus 30+ for premium alternatives
- No included lower parts kit - adds $45-65 to complete build
- Buffer tube threads require hand-tapping for perfect alignment
Expert review
Key attributes
| Caliber | 5.56 NATO |
| Receiver Material | Polymer |
| Jig Generation | Gen 3 |
| Weight | 3.2 lb |
| Dimensions | 12×8×4 in |
| End Mill Size | 5/16 in |
| Drill Bit Sizes | 3/8, 5/16, 1/4 in |
| Completion Time | 2-3 hours |
Frequently asked questions
- Is it compatible with AR-15 upper receivers?
- Yes, the lower receiver accepts all mil-spec AR-15 uppers. We verified fit with 12 different uppers including Anderson Manufacturing and Aero Precision. Buffer tube threads are cut to 1-3/16"-28 TPI specification.
- Does it fit standard AR-15 lower parts kits?
- Yes, it accepts all mil-spec AR-15 lower parts kits. The fire control group pocket requires milling to 0.86" depth. We recommend using a DPMS parts kit for guaranteed compatibility.
- How long does shipping take?
- Orders ship same day if placed before 3 PM EST via USPS Priority Mail. Delivery typically takes 2-3 business days continental US. International shipments require 7-10 days and additional paperwork.
- Can I return it if I damage during milling?
- No returns on milled receivers due to ATF regulations. Unused components carry a 30-day return policy. We recommend practicing on scrap polymer first - 15 minutes of practice reduces error rate by 62%.