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-   -   Adams Arms Uppers (http://www.assaultweb.net/forums/showthread.php?t=169610)

9th Company September 23rd, 2017 12:01

Adams Arms Uppers
 
Anyone use them? Looks like minor modifications to the bolt carrier group and a pistol instead of a gas tube, nice!

https://www.westernsport.com/product..._hsmi=56346968

9th Company September 30th, 2017 10:47

Re: Adams Arms Uppers
 
I just got mine. Although I have used the AR 15 series since One Station Unit Training in '84, I was first wary about its reliability, then reluctantly supportive. I have recently become less enamored with the direct gas impingement and its reliability, even with "regular" maintenance.

I think DoD should have at the least swapped out the old direct gas impingement uppers with piston uppers of whatever manufacturer in the last decade.

This might be the time to buy before evil black rifle laws go into effect (after Trump).

9th Company September 30th, 2017 12:15

Re: Adams Arms Uppers
 
No gas tube here
https://i.imgur.com/f5miDlw.jpg

Modified bolt carrier
https://i.imgur.com/IbmbImN.jpg

Bolt does not have gas rings
Bolt needs a spring to snap it back.
Black firing pin.
https://i.imgur.com/W2muuNu.jpg

Tread Head September 30th, 2017 18:45

Re: Adams Arms Uppers
 
The thing about these is the bolt tilt issues. Seems like robbing peter to pay paul? They do run...... however does it start other problems somewhere else.....?

The DI guns biggest problems are in the gas ports or front gas blocks. Undersized holes or oversized holes. The one gun that comes to mind that may be an answer is the, I hold my breath....... The SK Daewoo. Ugly gun for sure...... But its a departure from what we have seen here. Its really an AK style action though. But does work.

I don't know the answer to the DI issues. Or that a piston is the answer either. I remember the RHINO system from years ago. So the piston idea is not new.

JMHO
TH

BISHOP October 1st, 2017 23:03

Re: Adams Arms Uppers
 
A friend gave me an AR15 that had an Adam Arms piston upper. The whole gun needed cleaning.
He told me that is wouldn't eject.
I took a look at it and even fired a few rounds. Yup no ejection.

I did a bunch of internet learnin' that day. I had to figure out WHO was the maker of the gas system and how to take it apart.

He had shot some Corrosive 5.45x39 through it (it wasn't a .223) and it rusted up the gas piston.

After screwing with it for a while I was able to get it out and off the gun. I couldn't remove the rod from the piston. I soaked the set up in PB Blaster for 2 days to no avail.
It wasn't until I put a torch to it that it finally let go. I hit it with an emery cloth to smooth it down (didn't take the finish off BTW!) and git it all back to work.

So I was thinking of getting the Adams Piston kit before having to clean this up, and since I see how SO simply it comes apart I am still thinking about buying a kit for 1 or 2 of my ARs but one needs to remember to clean the piston immediately or it may seize up from carbon or corrosion because the fit is very fine, nearly air tight.


BISHOP

Southern Shark October 9th, 2017 23:13

Re: Adams Arms Uppers
 
Quote:

Originally Posted by Tread Head (Post 782553)
The thing about these is the bolt tilt issues. Seems like robbing peter to pay paul? They do run...... however does it start other problems somewhere else.....?

The DI guns biggest problems are in the gas ports or front gas blocks. Undersized holes or oversized holes. The one gun that comes to mind that may be an answer is the, I hold my breath....... The SK Daewoo. Ugly gun for sure...... But its a departure from what we have seen here. Its really an AK style action though. But does work.

I don't know the answer to the DI issues. Or that a piston is the answer either. I remember the RHINO system from years ago. So the piston idea is not new.

JMHO
TH

The Daewoo copied the AR-18.

You can buy something real close to that right now for $600 bucks. It's the Taiwanese T91 upper, which uses a piston. This upper has been used by the Taiwanese military for 30+ years in one format or another so it does work. It is currently imported by Wolf as the Wolf A1.

https://www.aimsurplus.com/product.a...r&groupid=4326

Tread Head October 10th, 2017 14:40

Re: Adams Arms Uppers
 
Quote:

Originally Posted by Southern Shark (Post 783445)
The Daewoo copied the AR-18.

You can buy something real close to that right now for $600 bucks. It's the Taiwanese T91 upper, which uses a piston. This upper has been used by the Taiwanese military for 30+ years in one format or another so it does work. It is currently imported by Wolf as the Wolf A1.

https://www.aimsurplus.com/product.a...r&groupid=4326

I was looking this one over the other day just so happens. For the $$ I am thinking of giving one a go.

TH

9th Company October 26th, 2017 00:50

Re: Adams Arms Uppers
 
I took it out the other day and it did not feed my reloaded ammo. Crap. I use a small base die on my brass and after thousands of tries I have a decent reload for my gas uppers. But not for this.:029: And the front assist was no help either.


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