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Questions & Answers
Customer Reviews
Helpful Positive Review Lower parts that Rock. by Bubba, Verified Owner, August 30, 2023
Everything fits as they should. The saftey knobs are able to be set how you want them as in the angle. Very much would highly recommend. More than likely going to order a few more of these set ups for my next builds
1/1 found this helpful
Helpful Negative Review Mr. drcmcico by drcmcico, Verified Owner, September 3, 2024
DO NOT BUY FOR AN AERO PRECISION LOWER RECEIVER!!! I’m Building an AR-10, 308 and purchased the CMMG LPK for 308. My lower receiver is an Aero Precion brand and the bolt catch does not work, and the magazine release is barely long enough. Soooo disap...
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1/1 found this helpful
Most Recent Reviews CMMG lower parts kit by drcmcico, Verified Owner, September 10, 2024
Not for my aplication. CMMG lower kit will not fit on an Aero Precision 308 Lower. Do not waste your money or time!
1/1 found this helpful
Most Recent Reviews Easy simple and worked as it should. by Slauer, Verified Owner, December 13, 2024
Kit was awesome, everything except pin for bolt catch worked(its a 25¢ roll pin) works wonders
Most Recent Reviews Good LPK for an Aero M5 with some notes by J, June 3, 2024
Bought this for an Aero M5 build, for those looking to do the same be aware that the bolt catch will not work with the aero upper like stated in other reviews, but also be aware that the pivot pin is slightly too large in diameter and slightly too sh...
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Most Recent Reviews CMMG zeroed by Doug Foote, Verified Owner, March 10, 2024
Dropped in like butter. Add a drop-in trigger and this bad boy is ready to rock.
Read All 10 Reviews
Gun Make: CMMG Gun Model: CMMG Mk3 Condition: New

Code: 2CM-LPK-CP39-38CA677

MPN: 38CA677

UPC: 810097502338

List: $130.02Save 23%
$100.69

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Product Info for CMMG Mk3 ZEROED Gunbuilder's Lower Parts Kit

Have a particular grip or trigger you want to use in your next AR10/LR-308 build? The CMMG ZEROED AR10 (Mk3/.308WIN) Gunbuilders Kit includes the essential parts except the most commonly upgraded ones like: Trigger Guard, Fire Control Group, and Pistol Grip. Check out our interactive install walkthrough video below or read the CMMG Resources LPK Install article for an in-depth breakdown. Not all .308 lowers are the same. Our kit is designed to work with our lowers (Gen 1 DPMS High-Pattern LR-308) and meet or exceed mil-spec. We would recommend checking with the manufacturer of your lower for compatibility of parts if you are not using our receiver.image

WARNING: California`s Proposition 65

Specifications for CMMG Mk3 ZEROED Gunbuilder's Lower Parts Kit:

Manufacturer: CMMG
Gun Make: CMMG
Gun Model: CMMG Mk3
Condition: New

Package Contents:

  • CMMG Mk3 ZEROED Gunbuilder's Lower Parts Kit
  • ZEROED Extended Bolt Catch Mk3
  • Bolt Catch Plunger Spring & Screw Pin
  • Trigger/Hammer Retaining Pins
  • ZEROED 60/90 Adjustable Ambi Safety Detent & Spring
  • ZEROED Ambi Magazine Catch & Spring
  • ZEROED Magazine Release Button
  • Mk3 HD Pivot/Takedown Pins Detents & Springs
  • Buffer Retainer & Spring

CMMG Mk3 ZEROED Gunbuilder's Lower Parts Kit Orderable Models

List of Orderable Models

CMMG ZEROED Gunbuilder's Lower Parts Kit, Mk3, 38CA677 , MPN: 38CA677 , UPC: 810097502338 , Code: 2CM-LPK-CP39-38CA677

CMMG Mk3 ZEROED Gunbuilder's Lower Parts Kit Unavailable & Discontinued Models

List of Unorderable Models

USED, CMMG ZEROED Gunbuilder's Lower Parts Kit, Mk3, 38CA677 , MPN: 38CA677-EDEMO , Code: 2CM-LPK-CP39-38CA677-EDEMO-RE-A
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