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Spike's Tactical - AR-308 Lower Parts Kit

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The Spike's Tactical AR-308 Lower Parts Kit sports military-grade hardware (minus that third safety position) with a great fit and finish. This kit is compatible with both retail-bought .308 stripped lowers, and .308 80% lower receivers.

What's Included

  • Trigger
  • Trigger spring
  • Disconnector
  • Disconnector spring
  • Stainless steel hammer
  • Hammer Spring
  • Trigger pins
  • Safety selector
  • Safety selector spring
  • Safety selector detent
  • .308 bolt catch
  • Bolt catch plunge
  • Bolt catch roll pin
  • Bolt catch spring
  • .308 magazine catch
  • Magazine catch button
  • Magazine catch spring
  • Takedown/pivot springs and detents
  • Buffer retainer spring
  • Buffer retaining pin,
  • Spike's Tactical Pro Grip
  • 1/4x28 Allen grip screw
  • Lock washer for grip screw

NOTE: This kit does not include pivot or takedown pins.

Completing Your .308 AR

In addition to this lower parts kit, a buffer kit is required to make your .308 lower receiver functional.

Buy a Buffer Kit here.

To make your custom .308 build even easier, check out our barreled .308 upper assemblies. Each includes a quality barrel, handguard, mil-spec bolt carrier group, and charging handle.

Buy a .308 Upper Assembly here.



WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to:

Shipping Restrictions

Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily. only ships within the United States. Federal legislation dictates we cannot ship our products internationally.

Spike's Tactical

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.