Hipointtalk.net

Hipoint Firearms
It is currently Sun Oct 22, 2017 9:41 pm

All times are UTC - 5 hours




Post new topic Reply to topic  [ 2 posts ] 
Author Message
 Post subject: ATI OMNI Polymer Lower Receiver & ATI Polymer Upper
PostPosted: Tue Nov 08, 2016 8:31 pm 
Offline
HPT Veteran
HPT Veteran
User avatar

Joined: Sat Mar 02, 2013 12:09 pm
Posts: 5046
Favorite Hi-Point: 45ACP
Gender: Male
Location: Philip SD
Age: 49
I've talked about these polymer lowers and uppers before, but I thought it'd be a good idea to share my experience with them.

I bought an American Tactical (ATI) lower back in March and put an Anderson slab-side upper and barrel on it.
I also put a 4-12x40 scope on it too. I sighted it in and did get an 1-1/2 five shot group with my reloads.

I put another AR together with both upper and lower being a polymer and both the same brand - ATI

Image

And in just putting them together right out of the box -I found that the pins do not line up.
The upper is too far forward:

Image

Here's another picture:

Image

And right here seems to be the problem:

Image

The upper is pretty "square" on the rear lug where the pin-hole is and contacts the rear of the lower.

In the next picture, you can see where I removed some material.
It is more material than I'd like to remove with a file or something similar.
I used my air powered die-grinder and removed a little material at a time.
It didn't take very long at all and the pins lined up just fine.
In the 1st pictures, I showed there was a good sized gap between the upper and lower.
While the gap was smaller - there is still a gap there - but it doesn't seem to matter.
It doesn't bother me anyway.

Here is where I removed the material:

Image

You can see it right under the threads where I rounded the back end of it.
I removed material from the lower here because this is where the polymer is cast around
the aluminum, and I figure it's a little stronger there.
The rear lug in the upper is all polymer - but I'm sure it could be rounded off a little.
I wish I woulda took a picture of it.

Another thing with these polymer parts - the front pin-hole lug on the upper is aluminum.
It seemed to have a few edges and small burrs - So i used a flat file and got rid of the edges smoothed things up,
And on both the upper and lower, I felt along every edge and smoothed anything I thought needed it.

And in shooting an AR made with a polymer upper, I noticed it smelled a little different that an aluminum upper.
Why? I'm not sure...

And with the ATI polymer upper, a regular "clam-shell" type upper clamp won't work.
I used the Magpul BEV Block and it worked great.

I wouldn't be afraid to use the polymer upper and lower combination.
I would like to spend some more time using them - but what the hell - they work!!
You can have a working AR-15 for a nice price. :great:

And I'm figuring on keeping the the AR I have with the polymer lower and Anderson upper for a while longer.
I just like it!!

Plus - this election could make it worth a LOT of money before too long... :whistle:

_________________
Schofield Gun Sales on FB

Know Guns, Know Safety, Know Peace.
No Guns, No Safety, No Peace.


“The right of the citizens to bear arms in defense of themselves and the state shall not be denied.”
Article VI, Section 24 of the South Dakota Constitution


I sure miss you Amp - (Dean Stephens) - Wish I could have met you.


Top
 Profile E-mail  
 
 Post subject: Re: ATI OMNI Polymer Lower Receiver & ATI Polymer Upper
PostPosted: Tue Nov 08, 2016 9:19 pm 
Offline
•°•○•°•○•°•○•°•○•°•○•°•
•°•○•°•○•°•○•°•○•°•○•°•
User avatar

Joined: Fri Oct 22, 2010 1:08 pm
Posts: 3213
Favorite Hi-Point: 40SW
Gender: Male
Location: missouri
Age: 51
I've used New Frontier polymer stripped lowers with standard LPK's installed, but never a polymer upper.

_________________
"Oh bother," said Pooh, "I'm out of ammo!"

http://elby.yolasite.com/ Mosin sight tools

http://www.lulu.com/spotlight/blrobinso ... geOffset=2
My fantasy novels and C&R Bound Book

http://blrobinson.yolasite.com/
My writing website


Top
 Profile E-mail  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 2 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group