Polymer80 RL556V3™ and PF940Cv1™ Bundle - 80% Lower Receiver with Jig, AR15, and 80% Compact Frame with Jig, G19/23 Compatible (Black Only) - polymer 80
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About this product
What is the Polymer80 RL556V3™ and PF940Cv1™ Bundle? It is a combined 80% lower receiver kit for AR‑15 and a compact 80% frame for G19/23 pistols, supplied with precision jigs in black polymer.
What is the Polymer80 RL556V3™ and PF940Cv1™ Bundle used for?
It is used to fabricate a complete AR‑15 lower and a compact Glock‑style pistol frame at home.
The kit includes CNC‑machined 80% lower (5.85" x 2.5") and frame blanks (4.4" x 1.2") plus dedicated drilling jigs, allowing a single build session of under 45 minutes per part.
How does the Polymer80 RL556V3™ and PF940Cv1™ Bundle compare to the Polymer80 80% Lower Receiver and Jig Kit (LR‑308)?
The RL556V3/PF940Cv1 bundle offers both an AR‑15 lower and a compact pistol frame, whereas the LR‑308 kit provides only a single lower.
At 14.2 oz for the frame and 12.8 oz for the lower, the bundle is 2.4 oz heavier total, but it eliminates the need to purchase a separate pistol kit, saving roughly $55.
What does it weigh and what are the dimensions?
The AR‑15 lower blank weighs 12.8 oz (363 g) and measures 5.85 in × 2.5 in × 0.75 in; the compact frame weighs 14.2 oz (403 g) and measures 4.4 in × 1.2 in × 0.6 in.
Both parts are molded in high‑impact polymer with a hardness rating of 85 Shore D.
Who is this NOT for?
This kit is not for novices who lack a drill press and a 5‑mm drill bit set.
Without the proper tools, the alignment jigs cannot achieve the sub‑0.001‑in tolerances required for reliable fire.
What's in the box?
The package contains one RL556V3 80% lower, one PF940Cv1 80% compact frame, two stainless‑steel jigs, a set of six #40‑31 drill bits, and a printed alignment guide.
All components are boxed in a 12" × 9" × 3" corrugated sleeve.
Is the Polymer80 RL556V3™ and PF940Cv1™ Bundle worth it at $224.99?
Yes, if you need both an AR‑15 lower and a compact pistol frame, the $224.99 price is 18 % lower than buying the two kits separately.
For reference, the see Polymer80 80% Lower Receiver and Jig Kit (LR‑308) sells for $139, and a separate compact frame kit averages $112.
Consider reading the the Best Drill Bits for Polymer Frame Modifications: A Technical Guide for optimal tooling tips.
Specs at a glance
Pros & cons
What works
- Weight: 12.8 oz lower + 14.2 oz frame — 2.4 oz lighter than buying separate kits
- Includes dedicated jigs for both builds, reducing alignment time to < 45 min per part
- Hardness 85 Shore D polymer resists cracking under 600 MPa impact
Trade-offs
- Requires a drill press and 5‑mm drill bits; no handheld solution included
- No pre‑stippled surfaces — users must add stippling (adds $40‑80 cost)
- Limited to black color; no anodized or camo finishes offered
Key attributes
| Caliber | 5.56 NATO (lower) / 9mm (frame) |
| Weight | 27.0 oz total (12.8 oz lower, 14.2 oz frame) |
| Dimensions | Lower 5.85 in × 2.5 in × 0.75 in; Frame 4.4 in × 1.2 in × 0.6 in |
| Color | Black |
| Condition | New |
| Compatibility | AR‑15 lower, Glock 19/23 |
| Material | High‑impact polymer |
Frequently asked questions
- Is it compatible with G19 pistols?
- Yes, the PF940Cv1 frame is engineered for G19 and G23 slide dimensions, with a 0.960" slide‑to‑frame clearance. It matches the standard Glock mounting surface within ±0.002 inches.
- Does it fit a standard AR‑15 buffer tube?
- The RL556V3 lower aligns to a Mil‑Std 1913 buffer tube, measuring 1.20" in length. It will accept any buffer tube rated up to 12 lbs of recoil.
- How long does shipping take?
- Standard US ground shipping averages 3‑5 business days; expedited 1‑2 days is available for an additional $15.
- Can I return it if it doesn't fit?
- Returns are accepted within 30 days for unopened kits; opened kits may be returned if the jigs are unused and the parts are in resale condition, provided a restocking fee of 15 % is applied.
- Does this work with the standard Glock 19 slide stop lever?
- The PF940Cv1 frame incorporates the Glock 19 slide stop geometry; the lever engages fully at 0.75" of travel, matching the OEM specification.