CMMG MK3 .308 Lower Parts Kit

$79.99 $78.00
(You save $2.13)
made in usa 80 lower
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 for use in billet .308 lowers it is recommended that you also purchase an Extended Mag Release Button. The standard mag release button in all .308 lower parts kits may be too short for many billet lowers. Extended mag release buttons can be found at the link below:

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