Polymer80 LR-308 80% Lower Receiver

If you are looking to build a custom .308 or 6.5 Creedmoor rifle without the paperwork hassle of a completed receiver, the Polymer80 LR-308 80% lower receiver hits that sweet spot between cost, capability, and build satisfaction. This is a genuine Polymer80 part, not a knockoff, and it brings the same modular design ethos they are known for in their Glock-style frames to the AR-308 platform. It is machined for a DPMS-pattern LR-308 build, so you have a solid foundation for a full-size rifle or a lightweight hunting rig.

Overview

The Polymer80 LR-308 80% lower receiver is a polymer-based, unfinished lower that requires you to complete the trigger pocket, drill the fire control pin holes, and mill out the rear takedown pin detent channel. It is compatible with DPMS-pattern high and low profile uppers, and it accepts standard AR-308 lower parts kits. The polymer construction keeps the weight down compared to an aluminum billet lower, and the integrated trigger guard means one less part to install. This is a true 80% receiver, meaning it is not considered a firearm by the ATF until you finish the machining process.

Features & Specs

This lower is built from a proprietary high-impact polymer blend that resists flex under recoil and holds up to the stresses of the .308 cartridge. The magazine well is flared for faster reloads, and the grip angle is similar to a standard A2 profile, which feels natural for most shooters. Here is what you can expect from the manufacturing specs:

• Manufacturer: Polymer80, Category: Parts. Designed for DPMS-pattern LR-308 builds.
• Requires standard AR-308 lower parts kit and buffer tube assembly for completion. No special tools beyond a drill press and a jig kit.
• Integrated trigger guard, flared magwell, and reinforced rear takedown lug for durability.

The polymer80 lr-308 80% lower receiver also features a threaded rear takedown pin detent hole, which makes assembly easier than the traditional spring-and- detent setup. The receiver is compatible with both high and low profile uppers, so you have flexibility in your build. Finish time for an experienced builder is around 60 to 90 minutes with the correct jig.

Who It’s For

This lower is ideal for DIY builders, hobbyists, and anyone who wants to avoid a serialized receiver. If you have experience finishing 80% AR-15 lowers, the process for the polymer80 lr-308 80% lower receiver will feel very familiar, just scaled up. It is also a good choice for budget-conscious builders who want to allocate more funds to the barrel, trigger, or optic rather than the receiver itself. Hunters, precision shooters, and competition shooters who want a dedicated .308 or 6.5 Creedmoor rifle without the full retail price of a completed gun will appreciate the savings and the satisfaction of building it yourself.

• Best for intermediate to advanced builders who are comfortable with a drill press and hand files.
• Suitable for hunting, target shooting, or building a lightweight patrol-style rifle.
• Not recommended for first-time 80% builders unless you have a jig kit and patience.

If you are on the fence about whether this receiver fits your build plan, know that it will work with most DPMS-pattern uppers and handguards. Just double-check your barrel nut and rail compatibility before you start machining.

Shipping & FFL

Because this is an 80% lower receiver and not a completed firearm, it ships directly to your doorstep with no FFL transfer required. No background check, no waiting period, and no transfer fees. However, once you finish machining it into a functional receiver, you are responsible for complying with all federal, state, and local laws regarding firearm possession and serialization. Some states, such as California, New York, and New Jersey, have restrictions on 80% receivers. It is your obligation to verify your local laws before purchasing this polymer80 lr-308 80% lower receiver.

• Ships to all US states where 80% receivers are legal. No FFL needed for shipping.
• You must be 18 or older to purchase. Signature may be required upon delivery.
• FFL disclaimer: This product is not a firearm. You are purchasing an unfinished piece of polymer that requires machining to become functional. Compliance with all applicable laws is solely your responsibility.