80 Percent Lower

80 Percent Lower — In Stock at Polymer80Glock17
Polymer80Glock17 carries the full 80 Percent Lower lineup, including complete kits,
frames, and build components. If you’re searching for polymer 80% lower, polymer 80 lower, polymer 80 lower receiver, 80 polymer lower, this category lists every
80 percent lower part we stock — no out-of-stock listings, no drop-shipped placeholders.

What’s in this Category
This page covers 80 percent lower components used by Glock-pattern builders. Most parts ship same-day
from US warehouses and are compatible with the 80 percent lower jig system included in our
complete kits. For a turnkey build, browse the
Polymer 80 Complete Kit page or return to Polymer80Glock17 for the
full catalog.

Compatibility & Build Notes
Most 80 percent lower parts on this page fit Gen 3 Glock 17, 19, 22, 23, 26, and 27 slides.
Always confirm slide rail spacing before final assembly. The most common build mistake is
over-cutting the rear rail block — go slow with the included end mill, take 5 thou per pass,
and dry-fit between cuts.

Top 80 Percent Lower Products
80% Lower Patriot PackPremium Fire/Safe Marked Billet 80% Lower Assembly.308 80% Lower – BilletForged Fire/Safe Marked 80% Lower AssemblyAR9 80% Lower Fire/Safe Marked – 9mm – Billet

Frequently Asked Questions
Are 80 percent lower parts legal to ship?
Yes — 80% frames and build components ship to most US states without an FFL. Check your
state laws before ordering; a handful of states (CA, NJ, NY, WA) restrict 80% frames.

Do I need a jig to finish a 80 percent lower frame?
The frame ships with a finishing jig that walks you through the 3 cuts and 2 holes
required. A drill press makes the job easier but a hand drill works.

What barrel and slide work with 80 percent lower?
Any Gen 3 Glock-pattern slide and barrel fits. We sell pre-fit slide assemblies in our
Complete Kit listings so you don’t have to source parts piecemeal.

How long does a 80 percent lower build take?
First-time builders finish in 2-4 hours. Experienced builders finish in under an hour. The
slowest step is jigging the rear rail block — take your time.