Easy Jig® + (1) .308 80% Lower

About this product

The Easy Jig® + (1) .308 80% Lower is a precision DPMS-pattern AR-10 building kit that combines a polymer 80% lower receiver with a machining jig designed for accurate finishing. This system lets experienced builders create custom firearms while maintaining control over the entire manufacturing process. Proper tool alignment and sequential drilling are critical for achieving the tight tolerances required for reliable .308/7.62x51mm operation.

What is the Easy Jig® + (1) .308 80% Lower used for?

This kit is designed for finishing an 80% lower receiver into a functional AR-10 lower using standard workshop tools. The jig provides precise drilling and milling guides for the fire control group pocket, trigger pin holes, and selector switch cavity with military-spec alignment. You'll need a drill press or milling machine, the included 5/16" end mill, and basic gunsmithing tools to complete the approximately 2-hour machining process.

How does the Easy Jig® + (1) .308 80% Lower compare to the 308 80% Lower – Billet?

The polymer lower in this kit weighs 9.8 ounces compared to the 14.2-ounce billet aluminum version. Polymer offers better impact resistance and corrosion immunity but lacks the heft some builders prefer for heavy .308 builds. The billet alternative provides superior rigidity for precision long-range applications but costs $45 more and requires different jig alignment procedures detailed in our alignment pin specifications guide.

What does it weigh and what are the dimensions?

The complete kit weighs 3.2 pounds with packaging, with the polymer lower itself measuring 9.5 inches long, 2.25 inches wide, and 1.8 inches high at the buffer tube interface. The jig adds another 1.4 pounds to the total weight and features hardened steel drill bushings rated for 500+ cycles before replacement. Critical tolerances are maintained within ±0.003 inches throughout the machining process when using proper technique.

Who is this NOT for?

This kit isn't suitable for beginners without metalworking experience or those lacking access to a stable drill press. The polymer construction won't satisfy builders wanting the tactical aesthetics of forged or billet aluminum receivers. If you need immediate functionality, consider our complete .308 lower and parts kit instead of this manufacturing project.

What's in the box?

The kit includes one DPMS-pattern .308 polymer 80% lower, one Easy Jig® with alignment pins, drill bushings, and template overlays. You'll also receive one 5/16" carbide end mill bit rated for 25,000 RPM operation and basic installation instructions. The jig itself features six hardened steel guide bushings positioned for exact FCG pocket milling and pin hole drilling sequences.

Is the Easy Jig® + (1) .308 80% Lower worth it at $0?

At this promotional price point, the kit offers exceptional value for builders who already own the necessary machining equipment. The jig alone typically retails for $120, making this essentially a free polymer lower with purchase. However, note that the $0 price likely indicates a temporary promotion rather than permanent pricing, so verify current costs before committing.