The magazines continued to stick in the well, though they became more likely to drop free as time went on. The more use, the more wear on the well – so I figured like the prior issue, there was just a little too much plastic. Once worn down, the magazines dropped out of the gun correctly. Interestingly, this seemed to fix the bolt catch problem as well. So, two of three problems solved.
I had two 5.56 uppers I tried with the ATI lower. One was a Rock River and the other was a Del Ton. Both uppers were very tight fits on the lower, and initially, I could not get the rear take down pin to fully seat. This was concerning, of course.Īfter eyeballing the lower it appeared that there was a little extra plastic material at the rear of the lower, near the buffer tube assembly. With a very careful and slight amount of force, I was able to grind a portion of the excess material down, which allowed both uppers to fit perfectly.
My Omni LowerĪ couple of weeks ago, I unboxed and gave you my initial impressions on the lower. My first impression was a bit mixed, as the assembled lower I received had a few quirks out-of-the-box (scroll to the bottom of this review to see my original post on the lower.)  First, the uppers were not mounting properly to the lower. Second, magazines were not dropping free from the mag well. Lastly, the bolt release was not working smoothly. I’m happy to say that all of the problems were resolved by then end of this testing, but I’m sure you would like to know how they played out. The stock on the complete lower is a M-4 type adjustable, and the pistol grip is a standard-style grip. 300 BLK, the lower is not rated for those calibers. I imagine like anything, the heavier you go, the shorter the lifespan. 410 bore calibers. Although it would probably run something larger, like a 6.8 SPC or. The ATI Omni is a polymer lower for the AR-15. It is designed to be compatible with all mil-spec uppers and parts. You can mount virtually any stock or pistol grip, and most if not all magazines should work fine with it. The Omni lowers are made of polymer, and can be had stripped (add your own pieces) or as a complete lower. I obtained a complete lower for review.
Looking for a low-cost, lightweight reciever for your AR-15 build? If you are not afraid of trying a polymer lower, give the Omni AR-15 from American Tactical Imports a look.
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