CM4 5.56 Forged Lower Receiver

Typically Processes/Ships within 5 days from receiving FFL Copy, Assembly may add additional time
(15 reviews) Write a Review

Centurion Arms LLC, C4 5.56 Forged Lower Receiver 7075-T6 Aircraft Grade Aluminum

Receivers Machined from Aluminum Forgings 7075-T6


M16/Auto Pocket

*** We recommend gunsmith installation for all of our parts.  We cannot warranty items damaged by improper installation.

**FFL Required Before Shipping. Please have your dealer email their license to and have them reference your name/order number. 

No we do NOT accept fax as we live in the modern world and we also do NOT accept carrier pigeon. **

Custom Cerakote Disclaimer:

Custom Cerakote is completed per order.  Our Cerakote room runs one color at a time so your ship date will be subject to the color rotaion at the time the order is placed.  You will receive an email confirmation once the item has actually been packaged to ship.

Cerakote items are not guaranteed to match separate batches or Cerakote completed by outside parties.  While we strive to keep our mix uniformed for our own products, we can't say for certain what Walter and Jesse cooked up in their lab out in Albuquerque.

Receivers Hardcoat Anodized per MIL-A-8625F, Type III, Class 2


Weight: .4lbs







  • 5

    There is a reason these are out of stock everywhere. Quality lower and great customer service.

  • 5

    Beautiful ano , extremely tight tolerances and tight fitment. Best company out there by miles.

  • 5
    Uppers - lowers

    If you know about Centurion and those that run/own it. You don’t really need to see reviews. Just go ahead buy what you want. Top notch stuff by good people. Simple.

  • 5

    Great lower

  • 5
    Outstanding fit/finish

    I was looking for a forged, mil spec lower and was told to check our Centurion Arms, and I’m glad I did. Fit between upper/lower was tight, anodizing was perfect, and all other dimensions were within spec. What more could you ask for?

  • 5
    Great lower

    Nice stripped lower. Finish is perfect. Mated it with a Solgw upper and the fit was right whobble. Recommend to all.

  • 5

    Top notch receiver, best lower I have ever bought. Fast shipment.

  • 5

    Very nice tight, positive fit on multiple uppers.