.308 80% Lower Receiver & Jig Kit

Polymer80 has attacked the AR-10 80% lower with a new, ultralight approach! Introducing the Warrhogg 308 80 percent polymer lower with jig, the world’s lightest DPMS platform .308 lower on the market. This new contender addresses a big problem for AR-15s chambered in .308, and that’s weight.

The .308 80% Lower Receiver & Jig Kit is the perfect starting point for anyone looking to build a custom .308 AR-style rifle. Whether you’re a first-time builder or an experienced gunsmith, this kit simplifies the process with precision components and step-by-step guidance. Designed for ease, compatibility, and legal compliance, it’s a trusted choice for serious firearm enthusiasts.

Key Features and Benefits of the 308 80 percent polymer lower with jig

High-Quality Construction

Crafted from aerospace-grade billet aluminum or reinforced polymer (model dependent), the 80% lower receiver delivers strength, reduced weight, and long-term durability.

Beginner-Friendly Machining

The included precision jig guides you through all the necessary cuts and drill points. No CNC machines needed—just basic tools like a router or drill press.

Versatile AR Compatibility

Designed to work with DPMS Gen 1 .308 platforms, this lower is compatible with most standard AR-10 upper receivers and lower parts kits.

Cost-Effective Customization

Skip expensive FFL fees. With this kit, you complete your own stripped lower in your garage or workshop, saving time and money.

Enhanced Privacy and Legal Ownership

In most states, completing your own 80% lower does not require serialization, background checks, or registration. (Always verify your local laws.)

What’s Included in the Kit

• 80% .308 Lower Receiver Blank (Billet Aluminum or Reinforced Polymer)
• Reusable .308 Machining Jig
• Drill Bits & End Mill Set
• Side Plates, Top Plate, and Templates
• Step-by-Step Instruction Manual (PDF or printed)

How the 308 80 percent polymer lower with jig Kit Works

1. Mount the Lower in the Jig
   Secure the 80% lower into the provided jig.
2. Drill and Mill with Confidence
   Use the jig’s templates to precisely guide the fire control group cavity and pinhole cuts.
3. Complete and Customize
   Once the lower is machined, install your AR-10 LPK, buffer tube assembly, and preferred upper.

Compatibility & Applications

• Works with DPMS Gen 1 Pattern Uppers
• Compatible with most AR-10 Lower Parts Kits (LPKs)
• Perfect for precision long-range builds, hunting rifles, or tactical applications

Why Choose Our .308 80% Lower Receiver & Jig Kit?

• Trusted by Thousands of Builders
• Made in the USA with military-grade materials
• Reusable Jig Saves Money on future builds
• Easy-to-Follow Instructions with support resources
• Fully Compliant with ATF regulations (where legal)

FAQs (Frequently Asked Questions)

1. Is this legal in my state?

It depends. In most U.S. states, 80% lowers are legal to own and complete. However, states like California, New Jersey, and New York may have restrictions. Always check your local laws.

2. What tools do I need to finish the lower?

You’ll need a drill (press preferred), router, clamps, and safety gear. All cutting tools required are included in the jig kit.

3. Can I reuse the jig for multiple builds?

Yes. The included jig is built for reuse and can help you finish multiple .308 lowers.

4. How long does it take to complete a lower?

Most first-time builders complete their lower in 2–3 hours. Experienced builders may finish in under an hour.

5. Will this work with my .308 upper receiver?

Yes, as long as your upper follows the DPMS Gen 1 pattern, it will fit this 80% lower.

The .308 80% Lower Receiver & Jig Kit offers the perfect balance of performance, affordability, and control over your custom rifle build. Whether you’re looking to save money, learn gunsmithing skills, or build a better AR-10 from scratch—this kit empowers you to do it all.

Order your kit today and take your first step toward building a custom .308 rifle that reflects your style and performance needs.