My Omni poly lowers have been great. Built about 6 guns and I’ve had no issues besides some of the spring holes having some burrs in them.
If any NYS need some PM me quick, they’ll be sold out in a couple days at best.
http://www.ebay.com/itm/130886648396?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
Might have a few lowers if anyone needs a friend. :snky:
You really trust 20,000- 60,000 PSI next to your face with a material that has been known to crack and fracture?
It’s fairly common that they break where the buffer tube threads into the lower. Not only are they dangerous but a large majority of them don’t even assemble correctly because of manufacturing defects and design flaws.
I will share some of the breakage pictures I have on my home PC tonight.
Not sarcasm this time.
is your issue with that brand or all poly lowers?
Lots of people have put a ton of rounds through the ATI ones…I have seen 1 failure thread about them on AR15.
Not sure how the lower would suddenly explode it might fatigue and crack where the buffer meets over time.
just got a box of 10, 30rd MagPul PMags delivered to my door 
debating on keeping them, or throwing them on Ebay and making $$ on them
On the issue of polymer lowers, the price difference just isn’t enough to deal with sub par parts. The shape of a lower was designed around the material properties of aluminum. From an engineering standpoint you can’t just replace that with a material with half the yield and ultimate strength, not to mention major weak points at flow fronts. Plastics are very good at many things, this is not one of them.
The second someone completely redesigns a lower around the material properties of plastics, and adds metal inserts for the trigger and hammer pin to run in, I’ll be all over them, until then, it’s not worth it.
Lastly, your firewall isn’t withstanding the pressures of internal combustion, but when an engine throws a rod, do you want a sheet of steel between you and the engine, or a sheet of plastic?
So you’re saying when an upper fails and blows up the lower being metal is going to save you? :lol:
Just for arguments sake a family member has had one of these for a while he just texted me backing saying he has 2000rds of 5.56 through it with a PSA upper no issues.(ATI Omni lower)
Nope, I’m saying It’ll reduce the damage to my hands, which I like to do things with.
I guess losing a face is better then losing a face and hand :lol:
I’m planning on bringing my AR with the ATI lower out next time I shoot I will post up if it breaks.
If you want a gun that you can take classes with and be even the slightest bit rough with, a plastic should be avoided. Now some of them do have a lifetime warranty, but I would rather spend time shooting than be without my gun due to a failed lower… Also something to keep in mind if you change out any of the lower parts that come in some of these lowers your warranty is null and void…
I have seen way to many first had failures and out of spec receivers to ever bother with a plastic lower. In fact its so bad that I refuse to work on them due to the liability. We have had lots of them transferred through us and way to many fail before they even get to the range, most broke during assembly that includes NF, PC and ATI.
I had two guys from ATI in the shop a couple months back bitching about how shitty the omni receivers are, how much extra BS they cause, and that they had 4x4’ palettes full of broken or out of spec receivers.
At the end of the day its the users choice, but my choice is to avoid them if you plan on using the gun for anything other than a safe queen or a rimfire plinker.
So your logic is it could hurt other parts of your body, so why protect any of them?
This isn’t even touching on material creep at the trigger group pins, and the flow front at the front end of the mag well. Both of these things make polymers not a suitable material for this application in this configuration.
With the current demand for lowers, poly lower manufacturers have been pumping parts out as quickly as possible. Tolerances and quality control are being thrown out the window, and reports of polymer lowers cracking in half while installing the LPK are starting to pop up daily. Shit parts are shit parts. They work for a while, and then they fail.
You bring up a good point. When these lowers first came out there was a guy that placed a 50 cal upper on one and shot several rounds through it. It survived and they were on the way to becoming all the rage!
The problem is that the 50 cal upper did not have semi auto bolt pulse moving through the gun, the recoil was always supported as the lower in that application is just along for the ride. The structural issues arise when you start shooting the gun off shoulder or put stress on the buffer tube in unusual ways.
Something like dropping to prone and landing funny on the butt stock or even shooting in an unusual position where the butt-stock is not firmly placed against a shoulder for support is what causes the most failures in these lowers. I have seen the front take down pin lugs fail and the mag well crack due to a malfunction though that is way less common.
These issues are all related to what Transporter said, they took a design made for one material and ported it to another medium without taking the right measures to make it stronger.
So standing at a range or sitting on a bench and running 2k rounds through it may not be a really good example of durability. If the lower lasts longer than the first barrel does on the gun, then we might be on to something. 
A good read on the specific one Gus ordered…
I’m not sure what to make of them, but I will say most of the stuff I hear against them sounds very familiar to the hysteria from some gun people when Glock start pushing poly framed handguns and look how that ended up.
If these failed at such a high rate there would be threads all over AR15.com and other places and searching threads the number of failures is low.
Mine didn’t break going together and I wasn’t gentle with it.
I understand all of the arguments against polymer however I think the failure rate is being highly overblown…The argument about tolerances being slightly off is probably more common.
I picked it up because it was cheap and I was already ordering two other lowers from PSA no regrets.
The original plan was throw a .22 upper on it however it currently has a 5.56 upper might switch it around waiting to see what happens with the NY/Fed
Other than the story from the guys @ ATI, the ones that I report broken are lowers that I have had interaction with first hand. Bafcom is not the end all be all that people think it is, MANY people have absolutely zero knowledge that it even exists. Most of which are much much better off that way…
Jays, the glock comparison is a good one but glocks and all polymer pistols for that matter have a steel chassis or bracing inside the plastic. That chassis takes the load and distributes it through out the gun, it allows flex but keeps it from ripping apart. These lowers have zero metal reinforcement, the quality of the plastic used in a glock is way higher than these lowers as well.
Like i said originally, they have a purpose and they do work well for a 22.
“And she keeps askin’, ‘How it shoot if it’s plastic?’” - lil wayne
As said by shockwave, poly lowers don’t have a steel chassis, the addition of one would make them a viable option, like I said in my first post.
However, you can’t compare Glock bodies to poly lowers because Glock designed their body around the material capabilities of their chosen polymer. No one did a full up analysis of a polymer lower before they were made, no one designed the lower around the constraints of polymers, which is why they fail where they do, in the way they do.
I’m going to take this poly gun to a tactical carbine class just to annoy you fucks
Don’t drop it.
I’m with Bpipe on poly lowers. If it works for you, great. I would never own one personally.
Baurle is either trying to get shut down or he is trying to get national attention. lol