Question about Stag Arms barrel?

[scubor2]

I bought a Stag Arms T2 from Big Boys Guns and ammo in Dec. 2012. Burk took me to Okc gun club and I got to try it on the steel targets. Later at his house Burk remarked the front sight looked off, Michelle said so too. I put a scope on it a few days ago and the cross hairs were lining up to the left of the left post on the the sight. I took it back to Big Boys and they said the barell was either drilled wrong or the post on the barell or notch on the reciever were not correct. The manager said he would send it back for me, so I left it with him. I am a little worried with Stags backlog situation how long it will take to get it back. Does this diagnosis of the problem seem correct and has any one else heard of this occurring with Stag AR's? This was my first AR purchase, though not at all my first rifle.

 

[Burk Cornelius]

Like Mikey said, it was defintely off to the naked eye even. I wanted to start beating the crap out of it with a hammer but he frowned at me. :wtf:

 

[scubor2]

It's not a farm implement Burk. But your eyes are better than mine, still didn't look like a John Deere to me.

 

[scubor2]

Gonna have to fall back on my Legend, if we go to the range, got plenty of bullets though.

 

[dennishoddy]

I bought a Single action .44 mag pistol several years ago. Like you, the sights were off, as the barrel thread was not indexed properly. The adjustable sights adjusted for it, but I sent it back anyway to be corrected.
There are the occasional bad parts that come out from every manufacturing facility. QC typically looks at every 25th to 100th parts, and some slip under the radar. I worked in Manufacturing for 22 years. Inserts on machine tools wear out, minor mistakes by the machine operator, etc.
Every manufacturer does their best to make the best product they can put out, but its not a perfect world.

Recent machine tool advances will compensate for tool wear, which is why the off the shelf barrel is just as accurate as some of the custom barrels from not so many years ago.

 

[scubor2]

According to them the barell is drilled for the pins. So something is off somewhere. It's just not drilled for a hex nut to hold it. I think some are done with hex nuts.

 

[scubor2]

It's the vice that usually gets me struck with a hammer. :roulette:

 

[scubor2]

Just my first time working with the retailer and manufacturer, makes me a little hinkey.

 

[dennishoddy]

I can see that. Weird things happen. I worked on one machine tool that had three positions. First one had two drill heads, second had two milling heads, and the third had another two drill heads.
Everything was controlled by a CNC. (computer)
Parts were in tolerance in the morning, but were much closer in the afternoon. It took awhile, but finally figured out that sun light coming through a window affected the photocell that was used for positioning for the first set of drill heads that controlled the rest of them. With the sun coming through the window the tolerance of +or- .007 varied back in forth somewhat.
Once I figured out that the sun coming throu the window was the problem the machine put out parts within .003.All of the parts were within specs, but the company wanted consistancy between parts, and that wasn't happening.
Just an example of how things can be different on guns.

 

[scubor2]

Who would have thunk it or figured it out, wild.

 

[scubor2]

But I am going to add that to my excuse list the next time I shoot worse than I normally do. :codemafia:

 

[dennishoddy]

I do that as well, enjoy and pass along the excuse.

 

[jtischauser]

I have to admit I took a tour of the Stag Arms plant and they let me install a front sight on a gun as part of the hands on experience. I was really nervous and kinda hung over. Do you know the serial number? I bet it was the gun I helped with.

 

[scubor2]

Uh, I'm pretty sure in that state of mind you would not have remembered a serial number. But thanks for working on my rifle. I'll get Burk to work on yours the next time he is suffering a big head. You should see what he can do with a sledge hammer, a virtual artist. :O

 

[scubor2]

Post the pics, but I believe you upfront.

 

[jtischauser]

Thinking more about this, which I have to admit hurts. Stag doesn't make their barrels in house. It's one of the few parts they purchased. Now I am not intimately familiar with the barrel building or AR15 manufacturing process. So I would assume that the barrel extension was probably attached out of alignment with the gas port and subsequently the front sight post. Then the guy or gal at Stag put it all together and it got by them and the person that test fires and/or QC checks everything. So that's my guess as to the issue.

Now how something like that gets by one or more people I dunno. I've work as a reliability engineering for several years the past. The odd mechanical and human errors that occur never cease to confuse and amaze.

I'm sure Stag will take car if the problem ASAP. If not your welcome to shoot one of my guns until they do.

 

[scubor2]

Thanks Jesse, but if I used one of your guns I would probably fall in love with something I have no business having. The wife would leave me, the house would leave me, the truck would leave me. But at least I would eat well, untill the game ranger caught me.