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.
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.
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 in under 1 hour with no drill press required.
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.

Holosun Red Dot 508T X2(2 MOA)

Calculated at Checkout


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Enhance your target acquisition speed and accuracy with this red dot sight from Holosun, the HE508T-RD X2. The X2 series of Holosun optics bring updated buttons, a new Lock Mode and several additional features — including Solar Failsafe, Multi-Reticle System, and Shake Awake.

The buttons are repositioned for a more streamlined optics system. The Multi-Reticle System allows users to switch between a 2 MOA dot, a 32 MOA circle or both simultaneously. With Lock Mode, gone are the days of your settings being accidentally changed, the optic will remain ready at your desired brightness.

Solar Failsafe and Shake Awake also helps you stay duty ready. Its integrated solar panel will keep the sight operating even when a battery fails. To activate Shake Awake, the dot will illuminate when motion is detected and it turns off when stowed away.

The Holosun HE508T-RD X2 is compatible with all standard RMR cutouts including our Shadow and Wraith G19 Slides.


  • MRS: Circle Dot

  • 2 MOA Dot

  • 32 MOA Circle

  • Up to 50,000 Hours Battery Life (At Setting 6)

  • 12 Brightness Setting: 10 DL & 2 NV Compatible

  • Complete Titanium Housing

  • Convenient Tray Battery Compartment

  • Parallax-free & Unlimited Eye Relief

80% Arms provides the highest level of customer service within the 80 percent and firearm industry as a whole. Providing prompt, informative information, and customer satisfaction is our bread and butter. For any questions or concerns regarding our products, please contact us at either, call us at (949)354-2767 or use our live chat!

Third Party Products:

We want to make sure you get the support you’re needing. Please contact the manufacturer of the product for any warranty/defect information if you have any issues with third party products included in this build kit. 

Shipping Restrictions:

This item is restricted from shipping to New Jersey, New York, Hawaii, Connecticut, Rhode Island, Washington D.C., Maryland, Illinois, California, Washington, Allenspark Colorado, Coal Creek Canyon Colorado, Eldora Colorado, Eldorado Springs Colorado, Gold Hill Colorado, Gunbarrel Colorado, Hygiene Colorado, Niwot Colorado, and Denver Colorado.