ATI Omni Multi-Caliber Complete Lower Receiver


Many of you know we have covered the stripped ATI Omni receiver previously. The model I looked over today is the complete lower ready to mount an upper and head to the range.

This Omni receiver is made to handle about any caliber upper you care to name.The user just needs to mount say a 6.8 caliber upper and it will function as well as a 5.56 upper. The main body is made of a polymer material with standard fire controls made of metal. Internals are mil spec parts. The buffer tube is metal with an included recoil spring. The stock is very similar to the military version. The trigger pull is a standard pull weight for most AR 15’s.

The lower itself has been tested extensively for durability and reliable function and passed all of the factory test. The price will get most readers attention. While the stripped lower is about $50 this complete lower is priced at $134.00. That’s a great price for any complete lower.


complete OMNI polymer lower receiver

ar15 223 parts kit

tele-stock , fixed open on new york model only

bullet button compliant for california

engineered to accept military spec .22lr , .223 , 5.56 and .410 uppers

Weight is 2 Lbs

Phil White

Retired police officer with 30 years of service. Firearms instructor and SRU team member. I still instruct with local agencies. My daily carry pistol is the tried and true 1911. I’m the Associate Editor and moderator at TFB. I really enjoy answering readers questions and comments. We can all learn from each other about our favorite hobby!


  • Ryan

    I can’t wait to buy one from Cheaper then dirt for $450.00

    • MosinMango

      But they’ll tell you that you’re getting 50 dollars off. So it’s still a good deal.

  • so… know anyone that has one in stock? a local gun shop had a stripped lower for 185, but they sold that real quick.

  • Raven

    So it’s a receiver that does what every other in-spec receiver does, except it’s polymer and slightly less expensive than a billet one?

  • Cymond

    Somebody needs to do a torture test showdown between the Omni and the New Frontier Armory LW-15.

  • gunslinger

    i thought we’d get a .223 and a .308 in the same version.

    this is the same thing as any other metal lower.

  • tincankilla

    just wait a couple months and the prices will drop once a ban is shown to be impossible. and, of course, once New Yorkers start unloading theirs.