latest upper/lower Mystery box ... contents revealed?

Redblack said:
That’s got to be the worse lower I’ve ever seen in my life.
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In retrospect, when the possibility of the AR-15 being banned earlier this month, everyone was scrambling in arms to get whatever stripped lower receivers they can get a hold of. And when it looked like there was no more, TNA stepped up with a whole bunch of these receiver set and at a affordable price. And sure, had TNA said they were BCL to begin with, perhaps a few buyers would have stayed away but I'm sure people would have still have bought them given the situation. My biggest question I have is, I wonder did BCL quickly rushed production on these lower receivers to get them out in the market? From the pics, they sure do look rough.
 
Got mine yesterday,finish is a little rough(I was expecting that given BCL’s past stuff,had some issues with the grip screw not being fully threaded,but Luckily I’m equipped to deal with that myself.

Overall I’m fine with it,TNA busted their asses to get these into the public’s hands, and I still have a functioning AR all built with spare parts for under $500 so I’m happy.

Now time to break out the rattle can and start blasting through all that Norinco 5.56 I have
 
gospel.mike said:
Got mine today. This is my first AR lower so don't know if this is what i should expect.


https://photos.app.goo.gl/URUtGAtwPTwvFb3W9

the trigger hole is not even round :(:(:(
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Looks like a beaver deburred those holes with its teeth. But that shouldn't affect function. Seems like they need to get someone a little better for hand finishing, or chuck an extra chamfer tool in the program. They're also pretty obviously vibratory deburring them in some kind of media; I don't know why they'd bother attempting to hand deburr those holes.

And... Trigger hole? Which? And how do you figure it isn't round?
 
I have to say that my BCL lower, unfinished, has no issues. The mystery upper, if indeed BCL, only had a few holes which were not deburred.

For the money I spent, I am satisfied.

I will upgrade as money, time and legal changes will allow.
 
MJS said:
Got mine yesterday,finish is a little rough(I was expecting that given BCL’s past stuff,had some issues with the grip screw not being fully threaded,but Luckily I’m equipped to deal with that myself.

Overall I’m fine with it,TNA busted their asses to get these into the public’s hands, and I still have a functioning AR all built with spare parts for under $500 so I’m happy.

Now time to break out the rattle can and start blasting through all that Norinco 5.56 I have
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Yup lets see how true the grip screw is, last time I just forced the screw in and used washers. Maybe i'll go grab a tap die set but throwing more money at NEA/BCL project is a waste.
 
IvarTheBoneless said:
Anybody have any ideas as to how to unf@¢% the trigger holes and the threading for those that are less than mechanically inclined?
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The trigger pin holes are likely just fine and won’t have any negative effect,but you could run KNS anti walk pins if your concerned(would also cover up those chatter marks)

The threading on your grip screw I’m assuming your talking about? It’s a 1/4”x28 threaded hole,so get a bottoming tap and use it to clean up the threads.

I also use a 3/4” bolt as opposed to the regular 1” that comes with most LPK and it works just fine.

It’s often tumbling media caught in the threads that mess it up.but this time the lower wasn’t threaded deep enough to take any of the hardware I had on hand,so out came the tap.
 
AntiKhaos said:
Yup lets see how true the grip screw is, last time I just forced the screw in and used washers. Maybe i'll go grab a tap die set but throwing more money at NEA/BCL project is a waste.
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I work on motorcycles pretty frequently so a tap and die set was close by and took 10 minutes to do,you can even get a Canadian fire brand set for like 25 bucks.

Handy to have regardless.
 
Got mine today and got the lower parts kit installed with no issues. Love the ambi bolt release and glad they gave the parts needed for it!
 
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