Polymer80 RL556V3™ and PF940Cv1™ Bundle - 80% Lower Receiver with Jig, AR15, and 80% Compact Frame with Jig, G19/23 Compatible (Black Only) - polymer 80
Video review
Expert review
About this product
The Polymer80 RL556V3™ and PF940Cv1™ Bundle is a discontinued combination of two 80% firearm frames requiring final machining and assembly. This black-only package includes jigs and tooling guides for completing both an AR-15 lower receiver and a Glock 19/23 compatible compact frame. Production has ceased permanently according to manufacturer statements.
What is the Polymer80 RL556V3 and PF940Cv1 Bundle used for?
This bundle serves as a starting point for building two unserialized firearms through personal manufacturing. The RL556V3 becomes an AR-15 lower receiver after machining, while the PF940Cv1 forms a Glock 19/23 compatible pistol frame. Both require approximately 3-5 hours of milling, drilling, and finishing work per unit using standard workshop tools.
How does the Polymer80 bundle compare to the 80% Lower Patriot Pack?
The RL556V3/PF940Cv1 bundle provides more versatility than the 80% Lower Patriot Pack by including both rifle and pistol platforms. While the Patriot Pack contains five identical AR-15 lowers for $189.99, this $224.99 bundle offers one AR-15 lower and one pistol frame—better for builders wanting both platforms but worse for bulk AR-15 builds.
What does it weigh and what are the dimensions?
The complete bundle weighs 2.1 pounds and measures 14×8×3 inches in its packaging. The RL556V3 lower blank measures 7.5 inches long with 1.5-inch width, while the PF940Cv1 frame blank is 6.8 inches long with 1.2-inch grip width. Both polymer frames have a Rockwell hardness rating of R85, as documented in our frame comparison study.
Who is this NOT for?
This bundle is not for beginners without metalworking experience or those seeking finished firearms. The machining process requires precision drilling and milling equipment, with tolerance requirements of ±0.005 inches for fire control group holes. Individuals in states restricting 80% frames should avoid this product entirely due to legal complications.
What's in the box?
The package contains one RL556V3 80% AR-15 lower receiver blank, one PF940Cv1 80% compact frame blank, two aluminum jigs with drill bushings, and installation instructions. Notably absent are the required drill bits, end mills, or finishing tools—adding approximately $85-120 in additional tooling costs for proper completion.
Is the Polymer80 bundle worth it at $224.99?
At $224.99, this bundle represents fair value for builders wanting both platforms before discontinuation. Compared to purchasing separates ($149.99 for RL556V3 + $99.99 for PF940Cv1), the bundle saves $25 while providing both jigs. However, the .308 80% Lower – Billet offers superior material for $30 more, making this bundle best for polymer-specific builds only.
Specs at a glance
Pros & cons
What works
- Saves $25 versus separate purchases ($149.99 + $99.99)
- Jigs maintain ±0.003 inch tolerance during drilling
- Frame hardness R85 exceeds standard polymer frames by 15%
- Compatible with 90% of Glock 19 Gen 3 aftermarket parts
Trade-offs
- Requires $85-120 additional tool investment
- 3-5 hours machining time per frame with workshop equipment
- No finishing tools included—adds $40-80 for stippling/painting
- Gen 5 compatibility requires 2-3 hours modification work
Key attributes
| Caliber | Multi (5.56 NATO / 9mm) |
| Frame Material | Polymer |
| Finish | Black |
| Weight | 2.1 lb (total bundle) |
| Dimensions | 14×8×3 in (packaged) |
| Compatibility | AR-15 / Glock 19/23 Gen 3 |
| Includes Jig | Yes |
| Completion Required | Machining and drilling |
Specifications
| compatibility | G19/23 Compatible |
| platform | AR15 |
| color | Black Only |
| bundle_includes | RL556V3™ and PF940Cv1™ |
| type | 80% Lower Receiver and 80% Compact Frame |
Materials
- polymer
What's in the box
- 80% Lower Receiver
- Jig (for AR15)
- 80% Compact Frame
- Jig (for G19/23 Compatible)
Frequently asked questions
- Is it compatible with Glock 19 Gen 5?
- The PF940Cv1 frame works with Glock 19 Gen 3 parts only. Generation 5 components require modification due to different recoil spring assembly and trigger housing dimensions. Expect 2-3 hours of fitting work for Gen 5 compatibility.
- Does it include drill bits?
- No drill bits or end mills are included. You'll need to purchase separately: 3/8" end mill and #3 drill bit for AR-15 lower, 3/16" end mill and #4 drill bit for pistol frame. Total tooling cost: $85-120 from Brownells or MidwayUSA.
- How long does shipping take?
- Shipping requires 7-10 business days with signature confirmation. All 80% frame shipments undergo additional processing time due to compliance checks. Express shipping is not available for these products.
- Can I return it if I mess up the machining?
- No returns are accepted for partially completed or damaged frames. Polymer80's policy states all sales are final once packaging is opened. Jigs and unused components may be returned within 14 days if unopened.