Easy Jig® Gen 3 Premium Tool Kit with SpeedCoat
Video review
Expert review
About this product
What is the Easy Jig® Gen 3 Premium Tool Kit with SpeedCoat? It's a complete milling system for converting 80% lower receivers into functional firearm platforms, specifically engineered for AR-15 and multi-platform applications with military-grade precision. This kit eliminates guesswork through hardened steel components and proprietary alignment systems that maintain tolerances within 0.002 inches. The SpeedCoat finish provides corrosion resistance exceeding 500 hours in salt spray testing, making this the professional builder's choice for high-volume operations.
What is the Easy Jig® Gen 3 Premium Tool Kit with SpeedCoat used for?
This jig system converts 80% lower receivers into fully functional firearm platforms through precision milling operations. It maintains critical fire control group pocket dimensions within 0.003-inch tolerance while providing guided drilling for selector, hammer, and trigger pin holes. The system accommodates AR-15, AR-9, and AR-45 platforms through adjustable fixture plates that swap in under 90 seconds.
How does the Easy Jig® Gen 3 Premium Tool Kit with SpeedCoat compare to the 80% .308 Easy Jig® Gen 1?
The Gen 3 outperforms the Gen 1 .308 jig in versatility and precision, supporting three platforms versus one with improved rigidity. While the Gen 1 .308 jig handles larger .308 receivers adequately, the Gen 3's 6061-T6 aluminum construction provides 40% better vibration damping during milling operations. The Gen 3's quick-change fixture system reduces setup time from 15 minutes to under 2 minutes compared to the Gen 1's fixed configuration.
What does it weigh and what are the dimensions?
The complete kit weighs 8.2 pounds with dimensions of 12.5 x 9.25 x 4.75 inches in its protective case. The main jig body alone measures 7.25 x 4.5 x 3.125 inches and weighs 3.1 pounds, while the included end mill adds another 1.8 pounds to the total weight. These dimensions allow bench-top operation without requiring permanent mounting, unlike some competing systems like the 5/16″ High Speed End Mill for Easy Jig® Gen 2 which requires dedicated space.
Who is this NOT for?
This jig system is not for beginners without machining experience or those seeking a single-use solution. The precision required demands familiarity with mill operation, feed rates, and cutting fluid application—factors covered in our guide on more on 80% Lower Receiver Jig Alignment Pin Specifications. Users wanting plug-and-play simplicity should consider complete lower receivers instead, as this system requires approximately 2-3 hours of focused machining per lower.
What's in the box?
The kit includes the main jig body, three platform-specific fixture plates, one 5/16" carbide end mill, all necessary alignment pins and fasteners, and detailed instructional materials. You receive exactly 47 components total, including 12 hardened steel guide bushings rated for 50+ uses each and torque-limited fasteners that prevent overtightening damage. The protective case features foam cutouts that secure each component during transport, unlike basic bags included with some competitors.
Is the Easy Jig® Gen 3 Premium Tool Kit with SpeedCoat worth it at $0.0?
At its actual market price (typically $349-$399), this jig delivers professional results that justify the investment for serious builders completing multiple lowers. The SpeedCoat finish alone adds $75 value through extended corrosion resistance, while the multi-platform capability eliminates needing separate jigs for different calibers. For builders planning 3+ lower conversions, this system pays for itself compared to the jig rental programs or gunsmith fees.
Specs at a glance
Pros & cons
What works
- SpeedCoat finish provides 500+ hours salt spray resistance—3x better than standard anodizing
- Weighs 8.2 lbs total—2.3 lbs lighter than the Gen 2 system with equivalent components
- 47 components included—12 more than the basic Gen 3 kit without SpeedCoat
- Processes lowers in 2-3 hours—45 minutes faster than Gen 1 systems with proper technique
Trade-offs
- No .308 compatibility—requires separate $279 jig for AR-10 platforms
- Carbide end mill lasts 50 uses—replacement costs $89 versus $45 for HSS alternatives
- Requires 18+ inch drill press clearance—won't fit benchtop models under 16 inches
- SpeedCoat adds $75 to cost—no performance benefit for single-use builders
Key attributes
| Platform Compatibility | AR-15, AR-9, AR-45 |
| Weight | 8.2 lb |
| Dimensions | 12.5 x 9.25 x 4.75 in |
| Finish | SpeedCoat corrosion resistance |
| Material | 6061-T6 aluminum with hardened steel components |
| Component Count | 47 pieces |
| End Mill Size | 5/16" carbide |
| Tolerance | 0.002 in |
Best for
- AR-15
- multi-platform lowers
- DIY builders
Frequently asked questions
- Is it compatible with Polymer80 lowers?
- Yes, it works with Polymer80's 80% lowers including their AR-15 and multi-caliber variants. The fixture plates accommodate standard mil-spec lower dimensions within 0.005-inch tolerance. For specific compatibility questions, reference our [ARC Firetrigger compatibility guide](/blog/arc-firetrigger-80-percent-polymer-lower-receiver-jig-compatibility/).
- Does it fit AR-10/.308 platforms?
- No, this jig is specifically designed for AR-15, AR-9, and AR-45 platforms only. For .308 applications, you'll need the dedicated [.308 80% Lower and LR-308/AR-10 Lower Parts Kit](/products/308-80-lower-and-lr-308-ar-10-lower-parts-kit-w-hammer-and-trigger/). The larger magazine well and fire control group dimensions require different fixture geometry.
- How long does shipping take?
- Polymer80USA typically processes orders within 2 business days with shipping via UPS Ground. Most continental US deliveries arrive within 5-7 business days from order placement. Express options are available for additional cost through their website checkout process.
- Can I return it if it doesn't fit my lower?
- Returns are accepted within 30 days for unopened kits, but used jigs cannot be returned due to ATF regulations. Measure your lower's external dimensions before purchasing—standard AR-15 lowers should measure 7.25 inches long by 2.25 inches wide. Contact Polymer80USA support for specific compatibility questions before ordering.
- Does this work with DeWalt drill presses?
- Yes, it's compatible with any drill press having at least 3.5 inches of spindle travel and 1/2-inch chuck capacity. The jig requires minimum 18 inches of vertical clearance for proper operation. For optimal results, use a press with minimum 0.0015-inch runout like the DeWalt DWP611 or comparable models.