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cc-settings-icon BUILD AT HOME
80% Arms sells AR-15 and .308 80% Lower Receivers, 80% Lower Jigs and other accessories which allow you to legally build a firearm at home in most states.
cc-gun-icon INCREDIBLY PRECISE
We utilize state of the art 5-axis CNC machines to mill all our .308 and AR-15 80 percent lower receivers to incredibly precise tolerances using premium billet aluminum.
cc-hand-icon RIDICULOUSLY EASY
We also offer our patented AR-15 and .308 Easy Jigs® which is the first 80% lower jig that makes it ridiculously easy for a non-machinist to finish their 80% lower.
cc-thumbs-icon 100% SATISFACTION GUARANTEED
Products manufactured by 80% Arms carry a lifetime warranty against manufacturing defects. We will promptly replace or repair any product that we determine to be defective.

Sig Grips

  • P365 Grip Module – S365 Alpha (Modular Upgrade)
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  • P365X Grip Module – S365 Delta (Modular Upgrade)
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  • P365XL Grip Module – S365 Striker (Modular Upgrade)
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  • P365L Grip Module – S365 Longshot (Modular Upgrade)
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  • S365 Modular Grip - Tumbled Finish - Safety Cut
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  • S365 Macro Grip Kit
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    S365 Macro Grip Kit

    $79.99
  • S365 Macro Grip Kit - Tumbled Finish
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  • S365 Modular Grip Extensions
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