do you believe these guys used to make airplane parts? a part that really needs to fit with other parts made by other companies!
wow
Bought NEA-15 upper, Doesn't fit.........
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do you believe these guys used to make airplane parts? a part that really needs to fit with other parts made by other companies!
wow
You'd be surprised how often precision manufactured parts are out of whack in a ton of industries.
I've done parts that had to be half a millimeter or better. I buggered up, or someone else buggered up further up the chain, or a supplier. Some mass manufactured goods were really "one offs" even though they came from the same batch. It happens. If it does not fit, make it fit.
There is no way a polymer lower is mil spec. Not a chance. Mil spec requires the lower to be made from aluminum etc.
So if all the measurements are to proper tolerances as per the military specification. Does it not equal mil specs? The person asked if the lower is in spec and it is in spec, it's within mil-spec tolerances where it matters.
the openings might be correct and within tolerances, but the material strength of the polymer lower will be no where near the strength of 7075 or 6061 aluminium and I don't think polymer is one of the material that is in the US Army specification document for M4 rifles.
more than likely it is the thickness of the polymer lower that is causing a fitment issues with the NEA upper.
I have no sympathy for people who fail to do their research before buying expensive gear. NEA is well known for less than quality or in spec products. There are much better brands for similar money and some killer deals on superior brands in the EE.
TW25B
TW25B
Which of course means that this is an NEA problem ............. uhhhhhhhhhhh?
GunsNotPuns
CGN frequent flyer
I was somewhat disappointed by this. I know money is money but...
Welcome to my world!
Lots of NEA stuff doesn't fit. Another case and point:
This is my dust cover. DD replacement on the gun, and NEA not. See the difference? The "pad" in the middle is much smaller on the NEA one, thus making it impossible to close the upper/lower with the dust cover open. The cover comes down to much, and catches on the lower's lip.
Again, why? These are standard parts, produced by God knows how many companies, and without these issues. I also had to clean up the holes for the dust cover rod, it was a super tight fit.
I've replaced 8 other things that just weren't right, or I didn't like. Solid gun otherwise since NEA replaced the handguard for the new version. Much better.
I got a NEA upper and lower and have had 0 problems.
Undergiver this is CGN, you should know by now that no one wants to hear anything positive about anything.
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The chances of multiple lowers being that far out of spec(dimensionally that is) is a far lower possibility than the upper being the culprit. Add in the endless threads about poor quality and craftsmanship, the shilling etc etc and it's a safe bet to make that the upper is indeed the issue.
TW25B
What brands did he try? Omni, Norinco, etc...
Or did he try Daniel Defense, Spikes, BCM, Noveske? Probably not.
Rob Arms has been making the XCR-L since 2006 and are on something like version 6 or 7 and they're just now getting close to getting those right yet people have been buying those rifles for years even though CGN members have been bashing them since day two.
How long have Ford, Chevrolet, and Dodge or even Mercedes been making cars? Yet they still have warranty claims daily and mass recalls all the time.
It's the cost of doing business these days when a company is trying to keep up with the demand of a large market.
How would we respond if these companies simply said "FU!, if you want a perfect product with no chance of issues we'll build every one by hand to exact tolerances and run them through 10 layers of QC before each one is released. Oh and by the way your Chevrolet Silverado will now cost you $300000 and we'll only be producing 1000 units per year for the world market. Please take a number and wait your turn."
Guess what, only the ultra rich would be driving cars and the rest of us would either ride a horse or take the bus.
If you want to see what it costs to have a perfect product have a look at Koenigsegg cars, they don't even list a price because unless you're a multi millionaire you can't afford one and there's no financing option for us mere mortals who want something we can't actually afford.
My point is that every company has issues, some more than others. The important thing to keep in mind is how do they stand behind their product.
Even top end companies throw out a dud every now and then, just ask Mike about the Christensen Arms AR he bought thinking he was getting one of the best rifles available.
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If you read my thread (mentioned earlier), I tried Colt, Bushmaster, and DPMS lowers on my NEA upper (with new gen rails) and it would not fit any of those lowers.
It will fit its own NEA lower. Why? Well, in my thread, I have a pic of why. The diameter of material around the pivot pin holes on their lowers is much less, so it fits.
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