Release: Glock-Mod Polymer80 RL556V3™ and PF940Cv1™ Bundle – 80% Lower Receiver with Jig, AR-15, and 80% Compact Frame with Jig, G19/23 Compatible (Black Only)
About this product
The Glock-Mod Polymer80 RL556V3™ and PF940Cv1™ Bundle is a dual-platform project kit containing a polymer AR-15 80% lower receiver and its jig, plus a Glock 19/23 compatible 80% compact polymer frame and its jig. This release consolidates the core components for building two distinct firearms from unfinished receivers, shipping as an in-stock bundle for 2026. For shooters building custom pistols, pairing this frame with a Glock 3.5lb Modified Cut Nub Connector is a logical next step to achieve a crisp, lighter pull.
What is the Polymer80 RL556V3 and PF940Cv1 Bundle used for?
This bundle is used for legally manufacturing two unserialized firearms for personal use. The bundle provides the unfinished "blanks" and precise machining templates for a customizable AR-15 rifle and a Glock-pattern compact pistol, requiring the end-user to perform the final 20% of machining, which typically involves drilling three fire control group pin holes and the trigger port on the RL556V3 lower, and completing the rear rail/trigger housing pocket on the PF940Cv1 frame.
How does the Polymer80 RL556V3 compare to a forged aluminum 80% lower?
The Polymer80 RL556V3 "Rhino" lower weighs 5.8 oz, making it approximately 75% lighter than a standard forged 7075-T6 aluminum 80% lower. For a range or lightweight build, the polymer lower is superior for weight savings and ease of machining with basic tools, while a forged aluminum lower like an Anderson Manufacturing AM-15 is better for hard-use applications demanding absolute material strength and heat resistance.
What does it weigh and what are the dimensions?
The combined shipping weight for the bundle is 2.1 lbs, with the PF940Cv1 compact frame measuring 7.4 inches in length and 1.3 inches in width. The RL556V3 lower receiver matches standard AR-15 lower dimensions at 7.75 inches long, 2.25 inches tall, and 1.0 inches wide, ensuring compatibility with any mil-spec upper receiver.
Who is this NOT for?
This bundle is not for first-time builders lacking access to a drill press or router, as completing both receivers requires steady hand tools and about 90 minutes of focused work per platform. It's also not for those seeking a finished, serialized firearm ready for immediate assembly with a Glock-Mod 2 PACK Trigger Shoe Kit, as significant fabrication is required.
What's in the box?
The box contains exactly four items: one black Polymer80 RL556V3 80% lower receiver, one reinforced polymer RL556V3 jig, one black Polymer80 PF940Cv1 80% compact frame, and one PF940Cv1 jig. You do not receive any pins, rails, lower parts kits, or tools; those must be sourced separately.
Is the Polymer80 RL556V3 and PF940Cv1 Bundle worth it at $254.24?
At $254.24, this bundle is worth it for a builder who wants to start two distinct projects, as purchasing the RL556V3 lower/jig and PF940Cv1 frame/jig separately would cost over $320. The price represents a 20% discount for committing to both platforms, making it cost-effective if you intend to build both an AR-15 and a Glock-pattern pistol.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 2.1 lbs total shipped — consolidates two project kits into one package.
- Saves approximately $65 vs. buying the RL556V3 and PF940Cv1 kits separately.
- PF940Cv1 frame accepts standard G19 LPKs — no proprietary parts required.
- RL556V3 jig works with billet and forged lowers — versatile beyond this bundle.
Trade-offs
- No rails or pins included with PF940Cv1 frame — adds $45-60 and vendor search for completion.
- Polymer lower has a 5,000-round estimated service life — less than half of a forged aluminum lower's durability.
- Black-only finish — no FDE or OD Green option for camouflage builds.
- Requires a drill press or router with 1/4" and 3/8" bits — not a hand-drill project.
Expert review
Key attributes
| Caliber Compatibility (AR) | Multi (5.56 NATO / .223 Rem) |
| Caliber Compatibility (Pistol) | 9mm / .40 S&W |
| Frame Material | Weapons-grade polymer |
| Frame Color | Black |
| Bundle Weight | 2.1 lbs |
| Pistol Frame Length | 7.4 in |
| AR Lower Length | 7.75 in |
| Condition | New, unfinished 80% receiver |
Frequently asked questions
- Is the PF940Cv1 frame compatible with Glock 19 Gen 5 parts?
- The PF940Cv1 frame is compatible with Glock 19/23 Gen 1-4 parts kits. You cannot use Gen 5-specific parts like the ambidextrous slide stop lever without modification. Source your parts kits from vendors like Lone Wolf Distributors or MidwayUSA for guaranteed compatibility.
- Does the RL556V3 lower work with a standard AR-15 pistol buffer tube?
- Yes, the RL556V3 lower accepts any mil-spec AR-15 buffer tube kit for rifle, carbine, or pistol configurations. The threaded rear takedown area is reinforced but uses the standard 1-3/16"-16 thread pattern. Installation requires a standard armorers wrench.
- How long does shipping take?
- We ship all in-stock items within 1 business day via USPS Priority Mail or UPS Ground. Delivery typically takes 3-5 business days for continental US addresses. International shipping is not available for this product.
- Can I return it if I make a mistake during machining?
- No. Due to the nature of 80% receivers, all sales are final once the product ships. Damaging the receiver or jig during your fabrication process voids any return or exchange eligibility. We recommend practicing on scrap polymer first.
- Does this work with a drop-in trigger for the AR-15 lower?
- Yes, once machined, the RL556V3 lower will accept any standard drop-in cassette trigger like a Timney Impact or a Rise Armament RA-535. The polymer fire control group pocket dimensions are mil-spec, designed for a .154" diameter hammer and trigger pins.