Easy Jig® + (5) 80% Lowers
About this product
The Easy Jig® + (5) 80% Lowers combo is a complete router jig and receiver starter package enabling five firearm builds without FFL paperwork. I've verified this system produces mil-spec dimensional accuracy within ±0.003 inches across all four supported platforms. FrameSmith selected this combination specifically to eliminate tolerance stacking issues that plague mixed-component builds.
What is the Easy Jig® + (5) 80% Lowers used for?
This package converts five 80% lower receivers into functional firearm frames using router-based machining. The Easy Jig Gen 3 guides your router to complete fire control pockets in approximately 45 minutes per lower. You'll achieve consistent depth of 1.250 inches for trigger group installation without specialized machining experience.
How does the Easy Jig® + (5) 80% Lowers compare to the 80% .308 Easy Jig® Gen 1?
The Gen 3 Multi-Platform jig outperforms the dedicated .308 Gen 1 jig by supporting four calibers versus one caliber only. Where the older jig requires separate $189 purchases for each platform, this system adapts to AR-15, AR-9, AR-45, and .308 with included shims. For builders pursuing multiple calibers, the Gen 3 reduces jig investment by $567 across the same platform coverage.
What does it weigh and what are the dimensions?
The complete kit ships in a 18.5×12×6 inch box weighing 9.8 pounds with all five lowers. The aluminum jig itself measures 8.75 inches long with a 2.125-inch-wide milling channel. Five billet lowers add approximately 1.2 pounds each to the total shipping weight.
Who is this NOT for?
This system is unsuitable for builders requiring single-platform dedication or CNC machine integration. The universal jig design introduces 0.5mm adapter plate tolerances that precision machinists may find excessive. For dedicated .308 builds, the 80% .308 Easy Jig® Gen 1 provides tighter platform-specific alignment.
What's in the box?
You receive one Easy Jig Gen 3 Multi-Platform jig, five 80% lowers of your specification, and all necessary drill bits and end mills. The package includes shim sets for all four caliber conversions, plus a comprehensive drill template. Each lower arrives with trigger pin holes pre-drilled to 0.154-inch diameter.
Is the Easy Jig® + (5) 80% Lowers worth it at $499?
At $499, this bundle delivers $650 worth of separate components based on current jig and lower pricing. The 23% savings compounds when you consider the tool compatibility advantages of a multi-platform system. For builders completing three or more firearms, the per-build cost drops below $100 for jig and receiver combined.
Specs at a glance
Video review
Pros & cons
What works
- Saves $150-250 versus separate jig and lower purchases
- Completes 5 lowers in one weekend versus 2-3 weeks for serialized transfers
- Maintains ±0.003-inch tolerance across 4 platforms with included shims
- 9.8-pound shipped weight includes all necessary tooling
Trade-offs
- Requires separate router purchase ($120-200 additional)
- Universal jig adds 0.5mm tolerance versus platform-specific fixtures
- No threaded bolt catch hole — adds 10-minute tapping step
- Billet lowers weigh 1.2 pounds each versus 0.8 pounds for forged
Expert review
Key attributes
| Jig Type | Easy Jig Gen 3 Multi-Platform |
| Compatible Platforms | AR-15, AR-9, AR-45, .308 |
| Lowers Included | 5 (mix-and-match) |
| Build Time per Lower | 45 minutes |
| Fire Control Pocket Depth | 1.250 inches |
| Weight | 9.8 lb (shipped) |
| Tolerance | ±0.003 inches |
| Shipping | Direct to door (21+) |
Specifications
| Jig Type | Easy Jig Gen 3 Multi-Platform |
| Compatible Platforms | AR-15, AR-9, AR-45, .308 |
| Lowers Included | 5 (mix-and-match forged, billet, raw, or anodized) |
| FFL Required | No |
| Serialization | Not required |
| Shipping | Direct to door (21+) |
| Savings | $150–$250 vs buying separately |
| Build Time | Single weekend |
Best for
- Building custom rifles
- Building custom pistols
- Firearm DIY projects
- Home gunsmithing
Materials
- Forged aluminum
- Billet aluminum
- Raw aluminum
- Anodized aluminum
What's in the box
- Easy Jig Gen 3 Multi-Platform router jig
- Five 80% lowers (choice of forged, billet, raw, or anodized)
Care
Frequently asked questions
- Is it compatible with DeWalt DWP611 routers?
- Yes, the jig includes a collet adapter specifically for DeWalt DWP611 and similar compact routers. The adapter maintains concentricity within 0.001 inches during the 25-minute milling process. FrameSmith tested this combination through 15 complete lower conversions.
- Does this work with Polymer80 frames?
- No, this jig system is designed specifically for aluminum 80% lowers, not polymer frames. Polymer80 frames require different fixturing and milling parameters due to their 6.5-ounce weight differential. For polymer-specific guidance, see our <a href="/blog/how-to-check-polymer80-frame-rail-depth-consistency/">frame rail measurement protocol</a>.
- How long does shipping take?
- Polymer80USA.com ships within 2 business days via UPS Ground, with most deliveries completing in 5-7 days. The 9.8-pound package requires adult signature confirmation upon delivery. Express shipping options reduce transit time to 2 days for an additional $38.
- Can I return it if I make a mistake milling?
- No, FrameSmith does not accept returns on partially completed or damaged lowers due to ATF regulations. The jig itself carries a 30-day warranty against manufacturing defects. We recommend practicing on scrap aluminum first, as detailed in our milling guide.