+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Reviews & Ratings for CMMG Mk3 AR10/LR-308 ZEROED Lower Parts Kit — 4 reviews

(4 reviews)
CMMG Mk3 AR10/LR-308 ZEROED Lower Parts Kit
CMMG Mk3 AR10/LR-308 ZEROED Lower Parts Kit
$134.95 $126.79 Save $8.16
View Product
Write a Review
Compare (0)
1 item has been added
Add at least two items to compare
Most Helpful Positive Review Awesome lower parts kit
This is a great kit. I put it in a aero lower really nice mag and bolt release. Also like the selector switch. I didn't use grip or trigger went with a 2 stage.
Show
Sort by
Filter by

Items missing, some doubled

by Ray, Verified Owner from FL, United States Written on April 24, 2025
The package was missing the trigger and hammer springs, the disconnector, and its spring. It also contained two safety groups.
Would recommend: No
Was it helpful to you? Yes | No
Share

CMMG delivered time and time again!

by David, Verified Owner from SC, United States Written on February 24, 2024
CMMG tim and time again deliveres. I have mever had a part that didn't fit or fail in the field. On all of my builds I insist on CMMG and i know I can come to Optics Planet snd always find what i need at competitive pricing.
Would recommend: Yes
Was it helpful to you? Yes | No
Share

good trigger

by muley, Verified Owner from NV, United States Written on August 20, 2023
I think this is a good trigger for the money. Like all milspec triggers it needed a little polishing but not bad. I really liked the grip. I did not like the safety selector switch at all I bought another one from another company. Overall it’s pretty good. I would recommend this trigger
Pros:
  • grip and feel
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No
Share
There are no reviews that match your criteria. Would you like to review this product?