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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.
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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.
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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.
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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.

CMMG MK3 .308 Lower Parts Kit

$99.99
$94.99
(You save $5.00 )
SKU:
38CA6DC
UPC:
8.52005E+11
Shipping:
Calculated at Checkout
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CMMG MK3 .308 Lower Parts Kit

This is a complete lower parts kit for DPMS pattern .308 lower receivers. Please read note below to determine if you may also need an extended length mag release button. These are proudly made in USA.

Parts are organized into color coded bags which contain:

  • Clear
    • .308 Takedown Pin
    • .308 Receiver Pivot Pin
    • Takedown Pin Detent (2)
    • Takedown Pin Detent Spring (2)
  • Yellow
    • Bolt Catch
    • Bolt Catch Plunger
    • Bolt Catch Screw
    • Bolt Catch Spring
    • Buffer Retainer
    • Buffer Retainer Spring
  • Blue
    • Magazine Catch
    • Magazine Catch Spring
    • Standard Size Magazine Release Button
  • Green
    • Safety Selector
    • Selector Detent
    • Selector Detent Spring
    • Lock Washer
    • Pistol Grip Screw
  • Red
    • Hammer & Trigger Pin (2)
    • Hammer Spring
    • Trigger Spring
    • Disconnect
    • Disconnect Spring
  • Hammer
  • Trigger
  • Pistol Grip

 

**Please note that we recommend buying the AERO Precision Extended Mag Catch Button for .308 as it is not included in the kit. The button is a drop in replacement for the standard lower receiver magazine catch button. This extended button is longer, allowing it to protrude the proper distance when used with our lower. 

 

 

 

 

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