Build Kits & Completion Kits

Build Kits & Completion Kits — the replacement catalog for builders left stranded when Polymer80 Inc. shut down in July 2024. If you have a half-finished build, a legacy P80 frame, or a parts list that assumes Polymer80 is a going concern, this category is built for you.
Every product in Build Kits & Completion Kits is mapped model-for-model to a legacy Polymer80 SKU: PF940v2, PF940C, PF45, PFS9, PFC9, and the Rhino G150 AR-15 platform. Our migration specialists vet each part for drop-in compatibility with existing P80 frames so your build doesn’t stall.
This category covers these search intents: polymer 80 build kit, p80 completion kit, 80 lower build kit. If you’re asking “is Polymer80 still in business?” — the answer is no, they closed. But your build isn’t dead. See our 2026 shutdown update and the model-by-model replacement guide.
Model-specific replacement hubs: PF940v2, PF940C, PFC9, PF45, and Rhino G150. We stock Lone Wolf, Geisler, JSD Supply, and 80 Percent Arms frames that physically drop into a P80 parts set.
P80-compatible is the new Polymer80. Finish the build you started.

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