CM4 5.56 Forged Lower Receiver

Typically Processes/Ships within 5 days from receiving FFL Copy - Assembly and Custom Cerakote Lead Times Vary (See Disclaimer Below)
(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


*** 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.


  • 5
    CM4 5.56 Forged Lower

    Great lower, fit finish. Mine was a complete lower everything perfect, enhanced mil spec trigger is great. You cannot go wrong with the product.

  • 5
    Excellent Magwell

    One thing I look at in a mil-spec forged lower is a nice flared magwell. I was very happy with this one. Some proclaimed high end companies fail to incorporate this detail. Looking at you Colt!

  • 5
    CM4 5.56 Lower Receiver

    Fit and finish, and durability of lower is superb. Used to build complete Centurion Rifle. Easily the best rifle in my collection. Customer service and response time is also outstanding. Own numerous CA products and always impressed with quality. Highly recommended.

  • 5
    Stripped lower

    Beautiful uniform anodizing , very tight tolerances absolutely no play attached to multiple uppers( bcm, DD, Geissele urgi. I will buy more and already have suggested others to buy

  • 5
    Centurion CM4 lower receiver

    Purchased this lower from Centurion Arms, due to having had great experiences with their rail systems. I was not disappointed. Built the lower into a SPR/MK12 type rifle that I coyote hunt with. The fit and finish were superb and Battle Arms lower parts kit fit like a glove. CMC trigger functions great. The Logo and markings are very simple and leaves the lower aesthetically uncluttered. The anodized finish was also perfect. I highly recommend this product.

    Gregory Fernatt
    Beckley WV.

  • 5
    Best there is

    Picked up a lower receiver with an upper and the fit and finish was superb. Now to get the build finish and sending lead down range.

  • 5
    Centurion CM4 lower receiver

    I have bought a lot of brands over the years always high end like Noveske, LWRC, BCM, Rainer Arms to say a few and this Centurion C4 is as good as those if not better and I know that Centurion does ALL of there own work to all of there parts. These are very nice parts and every part fit perfectly together. I have bought alot of parts from Centurion over the years and will keep doing.