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AR15 Upper Receiver Assembly

So I checked out BCM and I’m sure you get what you pay for. Adding in the cost of what I would hope to be a head spaced BCG that’s close to the cost of a complete rifle for just the upper.
True, they are spendy. But they’re also well made with top quality parts…and the upper is the heart of an AR.

If you’re looking for a decent budget upper, I’d go with PSA before Stoner. I’ve had good luck with all of my PSA builds.
 
Brownells has Aero and Geiselle on sale down right cheap right now. That's where I'd be looking.
On that subject—

Look at a Brownells BRN180 upper…complete, piston driven…they’re really nice. Probably my next build.

 
Brownells has Aero and Geiselle on sale down right cheap right now. That's where I'd be looking.
You can typically find some of the best prices on an Aero upper's from Optics Planet and they ship free.

@Keystone19250 if you do entertain Aero Precision look at the M4E1 upper as it has a lot nicer style.

You can't go wrong with Geiselle either as they one of the top tier manufacturers out there.
 
You can take an AR that's registered as a pistol and use it to build a rifle, but you can't take a gun that was manufactured as a rifle and put a short barrel on it. Legally that is. Yes, TexasforLife ATF regs are very confusing.
Pistol you can go longer, but rifle you can’t go shorter (without permission) . Also dont put a stock on that pistol even if you put the longer barrel on it, keep it as a braced lower.

It is exactly this confusion that makes so many of us so mad/sad at the current laws: they'll really only trip-up the otherwise law-abiding, while those who seek to do evil simply won't care.

This old ARFCOM thread actually is worth reading through: https://www.ar15.com/forums/ar-15/Pistol_vs_AOW/122-553969/ , and the following write-up is a succinct and clear summary: https://www.walkertaylorlaw.com/post/aow-loophole-closed

And this was an interesting case: https://www.thefirearmblog.com/blog...not-pass-muster-in-court-this-is-not-a-stock/

It's a tricky thing, not only at the federal level but also sometimes at the state level. Full-confession, it wasn't until much later in the course of the Rittenhouse saga that I finally found clarification as to the legality of his possession of the AR15 that he used.

There's a reason why I'm a scientist and not a lawyer, it seems. 😅


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So, shouldering the brace in public would/could be a bad idea?
Especially if a video of your range session ends up on YouTube. :)

Well......


The meme included in that particular write-up is particularly fitting.

"would/could/maybe" is about as much as any of us can really say. :ROFLMAO:
 
@Keystone19250 -

I wanted to separate this out, as it has nothing to do with legalities, and focuses instead on just the hardware. :)

Understand that even if you pursued a top-tier upper - as parts or fully assembled - there's still a possibility (however remote) that tolerance-stacking can occur, and the lower you possess may not "play well" with the upper.

This is in-part why complete guns as well as matched upper/lower receiver sets command the premium that they do, as that part of the QA/QC equation will be more completely satisfied.
 
@Keystone19250 -

I wanted to separate this out, as it has nothing to do with legalities, and focuses instead on just the hardware. :)

Understand that even if you pursued a top-tier upper - as parts or fully assembled - there's still a possibility (however remote) that tolerance-stacking can occur, and the lower you possess may not "play well" with the upper.

This is in-part why complete guns as well as matched upper/lower receiver sets command the premium that they do, as that part of the QA/QC equation will be more completely satisfied.
I’m looking forward to this. Always something to learn when you make a deep dive into these subjects.
 
I have no experience with that particular upper myself but I have read good things on it and It has me intrigued.

I've thought of getting one myself at some point plus the price isn't bad for what you get.
A couple friends have builds using them. I have been impressed what I’ve seen.

The buddy who built a SBR using the Brownells lower designed for it (no buffer, just a vertical rail on the back of the receiver) in .300? It’s a beast! Suppressed is a joy—you don’t eat ANY gas, at all.
 
A couple friends have builds using them. I have been impressed what I’ve seen.

The buddy who built a SBR using the Brownells lower designed for it (no buffer, just a vertical rail on the back of the receiver) in .300? It’s a beast! Suppressed is a joy—you don’t eat ANY gas, at all.
I've seen the BRN180 stripped lower on sale on Brownells website the weekend of black Friday for just over $100 now it's back up to $170.00 I should have picked one up then....🤦🏻‍♂️
 
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@Keystone19250 -

I wanted to separate this out, as it has nothing to do with legalities, and focuses instead on just the hardware. :)

Understand that even if you pursued a top-tier upper - as parts or fully assembled - there's still a possibility (however remote) that tolerance-stacking can occur, and the lower you possess may not "play well" with the upper.

This is in-part why complete guns as well as matched upper/lower receiver sets command the premium that they do, as that part of the QA/QC equation will be more completely satisfied.
And that happens to manufacturers that build in house guns if their own control! Some , even top tier can have this happen?
 
^ Absolutely. There are mistakes that go out the door with every make. It's just a part of reality. (y)

But what I'm trying to point out to @Keystone19250 is that in this specific case, his case, although going for a supposedly higher-quality (either or both of build/assembly and/or components) upper should give him better chances that the final mating to his lower will be trouble-free, it doesn't guaranty such.

Look at this n of 1 sample of a SOLGW East India upper, via SOTAR's awesome YouTube Channel:


I'm just trying to temper expectations, that's all. :) Things can happen, even with top-flight stuff.

And more towards this -

I’m looking forward to this. Always something to learn when you make a deep dive into these subjects.


^ I think that this SOTAR comparison of five KAC Sandcuttter BCGs (top-tier) is a very good example of minor variances that can potentially show unique issues when placed into unique final systems.


^ And here's an "autopsy" of one singular example of yet another Sandcutter - was this an escape from QA/QC?

Similarly, here is an n of 1 of a LMT enhanced bolt (top-tier) ---->


And finally, even more on-point, this is specifically explaining tolerance stacking - again, all the parts used here are considered top-tier:


Pay special attention to what Albrecht is saying. Tolerance stacking is possible, even with excellent components.
 
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^ Absolutely. There are mistakes that go out the door with every make. It's just a part of reality. (y)

But what I'm trying to point out to @Keystone19250 is that in this specific case, his case, although going for a supposedly higher-quality (either or both of build/assembly and/or components) upper should give him better chances that the final mating to his lower will be trouble-free, it doesn't guaranty such.

Look at this n of 1 sample of a SOLGW East India upper, via SOTAR's awesome YouTube Channel:


I'm just trying to temper expectations, that's all. :) Things can happen, even with top-flight stuff.

And more towards this -




^ I think that this SOTAR comparison of five KAC Sandcuttter BCGs (top-tier) is a very good example of minor variances that can potentially show unique issues when placed into unique final systems.


^ And here's an "autopsy" of one singular example of yet another Sandcutter - was this an escape from QA/QC?

Similarly, here is an n of 1 of a LMT enhanced bolt (top-tier) ---->


And finally, even more on-point, this is specifically explaining tolerance stacking - again, all the parts used here are considered top-tier:


Pay special attention to what Albrecht is saying. Tolerance stacking is possible, even with excellent components.
And THAT’S what I’m talkin’ ‘bout!
 
I guess I have just been lucky with ARs. Either that or my standards and expectations aren't that high. I have mated Anderson Lowers with Bear Creek uppers, PSA lowers with Bear Creek uppers ( and that's arguably the 2 most "Budget" build manufacturers I can think of) and my Adams Arms came stock with an Anderson lower. Never had a bit of trouble out of any of them.
 
I guess I have just been lucky with ARs. Either that or my standards and expectations aren't that high. I have mated Anderson Lowers with Bear Creek uppers, PSA lowers with Bear Creek uppers ( and that's arguably the 2 most "Budget" build manufacturers I can think of) and my Adams Arms came stock with an Anderson lower. Never had a bit of trouble out of any of them.
I think a lot of people are holding on to old notions abouts AR's and build quality not considering the advancements made in CNC machining and the programming for them in the past 10 years which had resulted in even budget friendly AR's being really reliable.

I have just under 20 AR's currently of different variations and I have yet to find a combination that didn't work like it should.

The only difference I've noticed with some budget brands is the fit is sometimes a little looser between the upper and lower (this does not seem to affect function) and the finish may have some blemish of be a more basic finish.
 
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I think a lot of people are holding on the old notions abouts AR's and build quality not considering the advancements made in CNC machining and the programming for them in the past 10 years which had resulted in even budget friendly AR's being really reliable.

I have just under 20 AR's currently of different variations and I have yet to find a combination that didn't work like it should.

The only difference I've noticed with some budget brands is the fit is sometimes a little looser between the upper and lower (this does not seem to affect function) and the finish may have some blemish of be a more basic finish.
I agree. I have about the same number of ARs, some high end, mid tier, and several fit and match like Bob has. Several of these I bought the uppers in different calibers, and all functions well as you state.
 
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