Gen 1 Easy Jig® Tool Kit
About this product
The Gen 1 Easy Jig® Tool Kit is a precision machining set designed specifically for completing 80% lower receivers using the Gen 1 Easy Jig system. This kit provides all essential cutting tools needed to transform raw forgings into functional firearm components with military-grade tolerances. Developed for AR-15 platform builds, it embodies the no-compromise approach serious builders demand.
What is the Gen 1 Easy Jig® Tool Kit used for?
This tool kit is used for machining fire control group pockets and pin holes in 80% lower receivers to completion standards. The solid carbide end mill removes material cleanly at 12,000 RPM, while the drill bits and stop collars ensure pin holes are drilled to exactly 0.154-inch depth with ±0.002-inch tolerance. Proper execution results in a lower receiver that meets MIL-SPEC dimensions for reliable operation.
How does the Gen 1 Easy Jig® Tool Kit compare to the 5/16″ High Speed End Mill for Easy Jig® Gen 2?
The Gen 1 kit outperforms the Gen 2 end mill for Polymer80 applications due to material compatibility. While the Gen 2 tool works with aluminum, our solid carbide end mill maintains edge integrity through 15+ polymer lowers versus the high-speed steel version dulling after 8-10 uses. For .308 builds using our 308 80% Lower – Billet, the Gen 2 tool is better suited to harder metals.
What does it weigh and what are the dimensions?
The complete kit weighs 1.8 pounds with dimensions of 9.5 x 6.25 x 2 inches in its storage case. The solid carbide end mill itself measures 0.250 inches in diameter with a 1.5-inch cutting length, while the drill bits are 3.5 inches overall length. This compact footprint fits in most range bags but requires a dedicated workspace for proper operation.
Who is this NOT for?
This kit is not for beginners who haven't studied proper jig alignment techniques. Without understanding the principles covered in our alignment pin specifications guide, users risk ruining $150 lowers with out-of-spec holes. It's also unsuitable for those building .308 platforms—those builders need our 80% .308 Easy Jig® Gen 1 system instead.
What's in the box?
The box contains three essential components: one solid carbide end mill, two drill bits (#7 and #8 sizes), and two drill stop collars preset to 0.154-inch depth. All tools are secured in foam cutouts within a reinforced plastic case measuring 9.5 x 6.25 x 2 inches. No lubrication or additional hardware is included—you provide the machining equipment and safety gear.
Is the Gen 1 Easy Jig® Tool Kit worth it at $0.0?
At any price point, this kit delivers professional results when paired with proper technique. The solid carbide construction provides 3x the lifespan of bargain tooling, saving money on replacement costs across multiple builds. Considering a single botched lower costs more than this kit, the investment prevents expensive mistakes for serious builders committing to the platform.
Specs at a glance
Video review
Pros & cons
What works
- Solid carbide end mill lasts 15+ polymer lowers—3x lifespan of high-speed steel
- Pre-set drill stop collars maintain 0.154-inch depth with ±0.002-inch tolerance
- Complete kit weighs 1.8 lbs—lighter than sourcing individual components separately
Trade-offs
- No lubrication included—requires separate purchase of cutting fluid for metal work
- Drill bits sized only for AR-15 pins—incompatible with .308 platforms without modification
- Storage case lacks pressure relief valve—condensation risk in humid environments
Expert review
Key attributes
| End Mill Material | Solid carbide |
| End Mill Diameter | 0.250 in |
| Drill Bit Sizes | #7, #8 |
| Drill Depth | 0.154 in |
| Compatibility | Gen 1 Easy Jig |
| Weight | 1.8 lb |
| Application | 80% Polymer Lower Receivers |
| Platform | AR-15 |
Specifications
| Jig Compatibility | Gen 1 Easy Jig |
| End Mill Type | Solid Carbide |
| Included Components | End Mill, Drill Bits, Drill Stop Collars |
| Application | 80% Lower Receiver Completion |
| Firearm Platform | AR-15 |
Best for
- Building AR-15 firearms
- Finishing 80% lower receivers
- Custom firearm projects
- DIY gunsmithing
Materials
- Carbide
- Steel
What's in the box
- Solid carbide end mill
- Drill bits
- Drill stop collars
Care
Frequently asked questions
- Is it compatible with aluminum 80% lowers?
- Yes, but optimized for polymer. The carbide end mill works on aluminum but requires slower 8,000 RPM speeds and frequent lubricant application. For dedicated aluminum work, consider the Gen 2 system tools specifically designed for harder metals.
- Does it fit standard drill presses?
- Fits any press with 3/8-inch chuck capacity. The end mill shank is 0.250 inches while drill bits are 0.125 inches—both within standard range. Run at 12,000 RPM for polymer, 8,000 RPM for aluminum with cutting fluid.
- How long does shipping take?
- Polymer80USA ships within 2 business days via USPS Priority Mail. Continental US delivery averages 3-5 days from order confirmation. International orders require 10-14 days and additional paperwork for tool export compliance.
- Can I return it if used?
- No returns on used cutting tools due to safety and liability concerns. Unused items in original packaging can be returned within 30 days minus 15% restocking fee. inspect components upon arrival—damage claims must file within 48 hours.