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 with the Gen 1 jig system. It includes solid carbide end mills and drill bits engineered to maintain tight tolerances during the milling process. This kit represents the essential cutting tools required to transform an unfinished receiver into a functional firearm component.
What is the Gen 1 Easy Jig® Tool Kit used for?
This tool kit is used for machining fire control pockets and pin holes in 80% lower receivers. The solid carbide end mill removes aluminum at a rate of 0.5 cubic inches per minute while maintaining ±0.001 inch tolerance. Drill bits feature 135° split points for clean entry without walking.
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 uses solid carbide tools while the Gen 2 end mill is high-speed steel. Carbide maintains sharpness for approximately 15-20 lowers versus 8-10 for HSS. However, the Gen 2 end mill costs $22.50 separately and fits only Gen 2 jigs, while this complete kit works exclusively with Gen 1 jigs.
What does it weigh and what are the dimensions?
The complete kit weighs 14.2 ounces in its packaging. The end mill measures 0.250 inches in diameter by 1.5 inches flute length. Drill bits are 3/8" diameter with 2.25" overall length. Storage case dimensions are 6" x 4" x 1.5".
Who is this NOT for?
This kit is not compatible with Gen 2 jigs or .308 80% Lower – Billet receivers. Builders working with larger format receivers should consider the 80% .308 Easy Jig® Gen 1 system instead. The tools are specifically sized for AR-15 platform receivers only.
What's in the box?
The kit contains one solid carbide end mill, three drill bits (3/8", 5/16", and 1/4"), and three drill stop collars. Packaging includes a protective plastic case measuring 6" x 4" x 1.5". Total component count is seven precision machining tools.
Is the Gen 1 Easy Jig® Tool Kit worth it at $44.99?
At $44.99, this kit provides all necessary cutting tools for approximately 15-20 lower completions. Compared to purchasing individual tools separately at $60-75, it represents a 25-40% savings. For builders following our precision drilling protocols, this kit meets the minimum quality threshold for reliable results.
Specs at a glance
Video review
Pros & cons
What works
- Solid carbide end mill maintains sharpness for 15-20 lower completions
- Complete kit includes all necessary tools for $44.99 - 25% cheaper than individual purchase
- Precision ground drill bits with ±0.001 inch tolerance for clean hole alignment
- 14.2 oz total weight with protective case prevents tool damage during storage
Trade-offs
- Not compatible with Gen 2 jig systems - requires separate $22.50 tool purchase
- Carbide tools are brittle - cannot withstand lateral forces exceeding 50 lb-in
- Limited to AR-15 platform - cannot machine .308 receivers without additional tooling
- No replacement guarantee - tools wear based on user technique and material hardness
Expert review
Key attributes
| Tool Type | Machining kit |
| Compatibility | Gen 1 Easy Jig only |
| End Mill Material | Solid carbide |
| End Mill Diameter | 0.250 inches |
| Drill Bit Sizes | 3/8", 5/16", 1/4" |
| Kit Weight | 14.2 oz |
| Case Dimensions | 6" x 4" x 1.5" |
| Expected Lifespan | 15-20 lower completions |
Best for
- finishing 80% lowers
Materials
- solid carbide
- steel
What's in the box
- precision solid carbide end mill
- drill bits
- drill stop collars
Frequently asked questions
- Is it compatible with Polymer80 frames?
- No, this kit is designed specifically for aluminum 80% lower receivers used with the Gen 1 jig system. Polymer80 frames require different tooling and jig configurations. The end mill and drill bits are optimized for aluminum removal rates of 0.5 cubic inches per minute.
- Does it work with Gen 2 jigs?
- No, the Gen 1 Tool Kit is not compatible with Gen 2 jigs. The tool dimensions and collar system are specific to the Gen 1 jig platform. Gen 2 jigs require the separate 5/16" High Speed End Mill which has different shaft diameter and flute geometry.
- How long does shipping take?
- Standard shipping through Polymer80 USA takes 3-5 business days for continental US orders. Expedited options are available for 2-day delivery at additional cost. International shipments typically require 10-14 business days for clearance and delivery.
- Can I return it if used?
- No, used machining tools cannot be returned due to safety and hygiene concerns. Unused tools in original packaging may be returned within 30 days subject to a 15% restocking fee. All returns require prior authorization from Polymer80 USA customer service.