80% lower jigs · our best sellers

Finish your 80% lower with the right jig

Jigs, tooling and parts for AR-15, AR-9 and LR-308 lowers. In stock and shipped in 2–3 business days.

Live inventoryReal-time stock on every item
Fast shippingShips in 2–3 business days
30-day returnsOn new, unused items
Real support888-310-0284

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Build kits

Everything for your Glock®-compatible build, in one box

Slide, barrel, frame parts and lower parts kit, matched and ready to assemble. Pick your model and finish.

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Magpul IndustriesReal AvidBreakthrough Clean TechnologiesUTGRook TacticalStrike Industries

In stock. Out the door.

What you see is what we have, and orders ship fast.

  • Live inventory on every item
  • Ships in 2–3 business days
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Builder guides

How-tos, part comparisons and build tips from the GBD team.

  • Step-by-step build how-tos
  • Part comparisons
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