Polymer80 G150 AR-15 80% Lower Receiver Kit with Jig – Flat Dark Earth

Description

You need a solid foundation for your AR-15 build. The Polymer80 G150 Phoenix2 80% Lower Receiver Kit delivers exactly that. This isn’t just a blank; it’s a complete system engineered for a successful first-time finish. With its proprietary polymer composite and solid core design, it provides the rigidity needed for a dependable firearm. The included J150 jig and all necessary tooling remove the guesswork, putting you in control of the final product from the ground up.

Product Overview

The Polymer80 G150 is a second-generation, 80% lower receiver kit designed for the AR-15 platform. It arrives as a non-firearm, requiring final machining by you to become a functional lower receiver. The core of the kit is the Phoenix2 lower, crafted from a proprietary, high-strength polymer composite. This material, combined with a solid core design and reinforced stress points, creates a receiver that stands up to the demands of regular use. The kit is comprehensive, bundling the lower, all necessary pins and hardware, and the dedicated J150 jig system with the correct drill and end mill bits. This is a turnkey solution for builders who want to avoid sourcing multiple components.

Key Features

• Phoenix2 Design: Features a solid core construction and a significantly stiffened magwell area for enhanced durability and reduced flex.
• Proprietary Polymer Composite: Engineered for high impact strength and dimensional stability, outperforming standard polymers.
• Complete Jig System (J150): Includes the precision-machined aluminum jig, a 7/16″ end mill bit, a 5/16″ drill bit, and a 3/8″ drill bit. Everything is matched to the receiver for perfect alignment.
• MILSPEC Buffer Tube Housing: Accepts any standard MILSPEC carbine or rifle buffer tube and stock assembly without modification.
• Included Hardware: Comes with a set screw bolt catch pin (3mm), dowel pin for bolt catch (5/8″), pistol grip nut (3/8″), pistol grip screw (1.5″), and a 1/16″ Allen wrench.
• Flat Dark Earth Finish: Ready-to-finish in a popular, neutral FDE color that pairs well with a variety of upper receivers and furniture.

Technical Specifications

• Model: Polymer80 G150 Gen2 (Phoenix2)
• Platform: AR-15 / Multi-Caliber
• Material: Proprietary Polymer Composite
• Color: Flat Dark Earth (FDE)
• Jig: Polymer80 J150 Aluminum Jig
• Included Tools: 7/16″ End Mill Bit, 5/16″ Drill Bit, 3/8″ Drill Bit, 1/16″ Allen Wrench
• Included Hardware: Set Screw Bolt Catch Pin, Dowel Pin, Pistol Grip Nut & Screw
• Firearm Status: 80% Lower Receiver (Not a firearm)

Compatibility

The G150 lower is designed for the standard AR-15/M4 platform. It is compatible with all MILSPEC AR-15 upper receivers, trigger groups, fire control parts, bolt catch assemblies, and magazine releases. The buffer tower is MILSPEC, accepting any standard carbine or rifle buffer tube, spring, and buffer weight. It will function with 5.56 NATO, .300 Blackout, 9mm (with appropriate mag block), and other cartridges commonly used in the AR-15 platform. Standard AR-15 pistol grips and stocks attach without issue.

Real-World Use Cases

This kit is ideal for the builder looking for a lightweight, cost-effective lower for a range rifle, truck gun, or training tool. The polymer construction shaves ounces compared to aluminum, which is noticeable in a fully assembled rifle. Its durability is well-suited for builds in common calibers like 5.56 or .300 Blackout where weight savings are a priority. The complete kit format makes it perfect for a first-time 80% builder, as it eliminates the need to research and purchase separate jigs and tooling. Experienced builders appreciate it for quick, simple projects or for creating dedicated lowers for specific uppers without the paperwork of an FFL transfer.

Legal & Compliance Notice

This product is intended for lawful use by law-abiding US citizens only. Buyers must be 21+ and comply with all federal, state, and local laws. Polymer80 products are sold legally and for legal purposes only.

Shipping & Trust

Ships fast from the USA. Authentic Polymer80 products. Discreet packaging available.

Frequently Asked Questions

What tools do I need besides what’s in the kit?

You will need a drill press or a sturdy handheld drill, a vise to securely hold the jig, and safety equipment (eye protection). The included J150 jig, end mill, and drill bits are all you need for the machining operations on the receiver itself.

Is this lower compatible with a .22LR conversion?

Yes. The G150 lower will work with standard .22LR conversion kits like those from CMMG or BoreBuddy, as they utilize a standard MILSPEC lower receiver fire control group pocket and magazine well.

How durable is a polymer lower compared to aluminum?

Polymer80’s proprietary composite is engineered for firearm use. While aluminum has different material properties, the Phoenix2’s solid core and reinforced design provide exceptional strength for the AR-15 platform. It is more than capable of handling the stresses of standard calibers and is widely used by thousands of builders.

Ready to start your build? The Polymer80 G150 kit provides a proven, complete solution. Add to cart now to ship direct to your workshop.

Available for fast shipping to Texas, Florida, Arizona, Nevada, Montana, Wyoming, Idaho, Utah, Alaska, Colorado, Georgia, Tennessee, North Carolina, Virginia, Pennsylvania, Ohio, Michigan, and all other eligible US states.