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AR15 Upper Receiver Assembly

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.
While CNC can go a ways to make better parts…when assembling, there’s a big difference between wrench monkeys churning out as many as possible, and people who actually know what they’re doing putting together a quality unit.

That’s what you pay for on the higher end uppers.
 
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.
I've purchased several "blems" that look perfectly good from AP and other manufacturers. They become test subjects!
 
I've purchased several "blems" that look perfectly good from AP and other manufacturers. They become test subjects!
I've never purchased a blem intentionally but I did accidentally once on a Spikes lower where there was an obvious imperfection under the finish that I wasn't too pleased about as I try to keep all my firearms looking pristine as possible especially when I'm putting together something I don't want to abuse.

I do have a few store bought AR's but I mostly have ones I put together for a more personalized package.
 
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It's not about price.

It's not about "tier."

And the possibilities of having something that works versus something that outright doesn't work is skewed much more in-favor than it is against, simply because of the overall tolerances of the system.

The "does it run?" or "run it" mentality really isn't the right way to go about answering this kind of question, because we've seen time and again that the odds are overwhelmingly in favor of "the adult LEGO" to do just fine.

Rather, this is simply about understanding where there may be problems, and understanding what is actually going on when those problems manifest, whether it be out-of-the-box issues or only manifest upon harsh use (or even abuse).

This is specifically why I chose to showcase those particular SOTAR videos - I specifically picked instances where Albrecht had the chance to pursue what folks would consider to be "higher-end" components, ones which are in the pricier end of the market, demanding premiums that are typically above (if not far above) "lesser" counterparts.

The reality is that we all exist as that unique n of 1 sample. As-such, it's on-us to vet our individual weapons. Look at that one Sandcutter BCG that refused to run and had a broken gas key fastener? And towards @10mmLife 's post above, I can draw a personal example - my BCM:Battle Arms Development/upper:lower (billet) combo fits with noticeable play, whereas my Aero does not; yet of the two that BCM holds noticeably tighter groups.

Understanding that there are differences in materials, build quality, QA/QC, as well as the possibility of tolerance stacking with even the best components - this isn't meant to disparage a home-build using less-costly and supposedly "lesser" components or to somehow extol supposed merits of magical unobtanium that one had to trade their firstborn for. This is about understanding how the system is supposed to work so that we can better understand how to address the problems that inevitably arise.

Look at it this way, with everything else equal, who would I pick for a partner in a class?

A shooter who brought in a cosmetically beat-to-hell self-built PSA, with SOTAR videos in his YouTube Watch History and who's breakfast table-chatter is about the difference his gun groups with one ammo versus another....

Or a shooter who is unpacking his fresh-from-the-store Knights SR15, with a phone full of sexy gun-bunny pictures and who talks only of the latest and greatest gear.....

I'm betting that when my gun goes down, that first guy is more likely to be the one who pulls a BEV Block and a portable hitch vise out of his truck.

;)
 
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It's not about price.

It's not about "tier."

And the possibilities of having something that works versus something that outright doesn't work is skewed much more in-favor than it is against, simply because of the overall tolerances of the system.

The "does it run?" or "run it" mentality really isn't the right way to go about answering this kind of question, because we've seen time and again that the odds are overwhelmingly in favor of "the adult LEGO" to do just fine.

Rather, this is simply about understanding where there may be problems, and understanding what is actually going on when those problems manifest, whether it be out-of-the-box issues or only manifest upon harsh use (or even abuse).

This is specifically why I chose to showcase those particular SOTAR videos - I specifically picked instances where Albrecht had the chance to pursue what folks would consider to be "higher-end" components, ones which are in the pricier end of the market, demanding premiums that are typically above (if not far above) "lesser" counterparts.

The reality is that we all exist as that unique n of 1 sample. As-such, it's on-us to vet our individual weapons. Look at that one Sandcutter BCG that refused to run and had a broken gas key fastener? And towards @10mmLife 's post above, I can draw a personal example - my BCM:Battle Arms Development/upper:lower (billet) combo fits with noticeable play, whereas my Aero does not; yet of the two that BCM holds noticeably tighter groups.

Understanding that there are differences in materials, build quality, QA/QC, as well as the possibility of tolerance stacking with even the best components - this isn't meant to disparage a home-build using less-costly and supposedly "lesser" components or to somehow extol supposed merits of magical unobtanium that one had to trade their firstborn for. This is about understanding how the system is supposed to work so that we can better understand how to address the problems that inevitably arise.

Look at it this way, with everything else equal, who would I pick for a partner in a class?

A shooter who brought in a cosmetically beat-to-hell self-built PSA, with SOTAR videos in his YouTube Watch History and who's breakfast table-chatter is about the difference his gun groups with one ammo versus another....

Or a shooter who is unpacking his fresh-from-the-store Knights SR15, with a phone full of sexy gun-bunny pictures and who talks only of the latest and greatest gear.....

I'm betting that when my gun goes down, that first guy is more likely to be the one who pulls a BEV Block and a portable hitch vise out of his truck.

;)
I've been binge watching a lot of SOTAR videos these past few weeks on AR rifles.

I've also been known to dive deep into the Larry Potterfield gunsmithing video series on YouTube. Larry is an extremely talented master gunsmith and most people would be amazed at the level of knowledge and talent he has towards all things firearms.
 
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It's not about price.

It's not about "tier."

And the possibilities of having something that works versus something that outright doesn't work is skewed much more in-favor than it is against, simply because of the overall tolerances of the system.

The "does it run?" or "run it" mentality really isn't the right way to go about answering this kind of question, because we've seen time and again that the odds are overwhelmingly in favor of "the adult LEGO" to do just fine.

Rather, this is simply about understanding where there may be problems, and understanding what is actually going on when those problems manifest, whether it be out-of-the-box issues or only manifest upon harsh use (or even abuse).

This is specifically why I chose to showcase those particular SOTAR videos - I specifically picked instances where Albrecht had the chance to pursue what folks would consider to be "higher-end" components, ones which are in the pricier end of the market, demanding premiums that are typically above (if not far above) "lesser" counterparts.

The reality is that we all exist as that unique n of 1 sample. As-such, it's on-us to vet our individual weapons. Look at that one Sandcutter BCG that refused to run and had a broken gas key fastener? And towards @10mmLife 's post above, I can draw a personal example - my BCM:Battle Arms Development/upper:lower (billet) combo fits with noticeable play, whereas my Aero does not; yet of the two that BCM holds noticeably tighter groups.

Understanding that there are differences in materials, build quality, QA/QC, as well as the possibility of tolerance stacking with even the best components - this isn't meant to disparage a home-build using less-costly and supposedly "lesser" components or to somehow extol supposed merits of magical unobtanium that one had to trade their firstborn for. This is about understanding how the system is supposed to work so that we can better understand how to address the problems that inevitably arise.

Look at it this way, with everything else equal, who would I pick for a partner in a class?

A shooter who brought in a cosmetically beat-to-hell self-built PSA, with SOTAR videos in his YouTube Watch History and who's breakfast table-chatter is about the difference his gun groups with one ammo versus another....

Or a shooter who is unpacking his fresh-from-the-store Knights SR15, with a phone full of sexy gun-bunny pictures and who talks only of the latest and greatest gear.....

I'm betting that when my gun goes down, that first guy is more likely to be the one who pulls a BEV Block and a portable hitch vise out of his truck.

;)
I’m thinking I’d want to get to know both guys, if you need help with something the first guy can work on your gun and the second guy may have a gun bunny in his truck that can help you forget your problems. 😁😎😂😂
 
It's not about price.

It's not about "tier."

And the possibilities of having something that works versus something that outright doesn't work is skewed much more in-favor than it is against, simply because of the overall tolerances of the system.

The "does it run?" or "run it" mentality really isn't the right way to go about answering this kind of question, because we've seen time and again that the odds are overwhelmingly in favor of "the adult LEGO" to do just fine.

Rather, this is simply about understanding where there may be problems, and understanding what is actually going on when those problems manifest, whether it be out-of-the-box issues or only manifest upon harsh use (or even abuse).

This is specifically why I chose to showcase those particular SOTAR videos - I specifically picked instances where Albrecht had the chance to pursue what folks would consider to be "higher-end" components, ones which are in the pricier end of the market, demanding premiums that are typically above (if not far above) "lesser" counterparts.

The reality is that we all exist as that unique n of 1 sample. As-such, it's on-us to vet our individual weapons. Look at that one Sandcutter BCG that refused to run and had a broken gas key fastener? And towards @10mmLife 's post above, I can draw a personal example - my BCM:Battle Arms Development/upper:lower (billet) combo fits with noticeable play, whereas my Aero does not; yet of the two that BCM holds noticeably tighter groups.

Understanding that there are differences in materials, build quality, QA/QC, as well as the possibility of tolerance stacking with even the best components - this isn't meant to disparage a home-build using less-costly and supposedly "lesser" components or to somehow extol supposed merits of magical unobtanium that one had to trade their firstborn for. This is about understanding how the system is supposed to work so that we can better understand how to address the problems that inevitably arise.

Look at it this way, with everything else equal, who would I pick for a partner in a class?

A shooter who brought in a cosmetically beat-to-hell self-built PSA, with SOTAR videos in his YouTube Watch History and who's breakfast table-chatter is about the difference his gun groups with one ammo versus another....

Or a shooter who is unpacking his fresh-from-the-store Knights SR15, with a phone full of sexy gun-bunny pictures and who talks only of the latest and greatest gear.....

I'm betting that when my gun goes down, that first guy is more likely to be the one who pulls a BEV Block and a portable hitch vise out of his truck.

;)


You may be on to something here. It is probable that the reason all mine run just fine and I don't notice any difference whatsoever ( aside from cosmetics) between any of my low rent frankenguns and my buddy's $2200 Daniel Defense ( and I have shot them side by side) is because I'm not capable of noticing a low MOA difference in group size based on shots I actually took. Whereas someone with skill and many more hours behind them might. Frankly if I can hit a 6" circle the majority of the time I am satisfied.

I intend to do some carbine courses soon, where I assume good hits are good hits and the emphasis is more speed and on the when and how and under what conditions. Operator courses may reveal differences between my junk guns and actual high quality guns. Do my guns continue to run and give me good hits ( commensurate with my skill, or lack of skill, level) under extremely adverse conditions? We'll see.

Other than that I am bored with ARs. Taking static shots from 50-100 yards with red dot equipped ARs Isn't really all that interesting anymore. That's why I took the Romeo off my last gun ( Bear Creek .223 Wylde upper on a PSA lower with enhanced mil spec guts) and put a $70 Primary Arms 3-9X44 on it. Now we're going to see how good of hits I can make at 200-400 yards.

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You may be on to something here. It is probable that the reason all mine run just fine and I don't notice any difference whatsoever ( aside from cosmetics) between any of my low rent frankenguns and my buddy's $2200 Daniel Defense ( and I have shot them side by side) is because I'm not capable of noticing a low MOA difference in group size based on shots I actually took. Whereas someone with skill and many more hours behind them might. Frankly if I can hit a 6" circle the majority of the time I am satisfied.

I intend to do some carbine courses soon, where I assume good hits are good hits and the emphasis is more speed and on the when and how and under what conditions. Operator courses may reveal differences between my junk guns and actual high quality guns. Do my guns continue to run and give me good hits ( commensurate with my skill, or lack of skill, level) under extremely adverse conditions? We'll see.

Other than that I am bored with ARs. Taking static shots from 50-100 yards with red dot equipped ARs Isn't really all that interesting anymore. That's why I took the Romeo off my last gun ( Bear Creek .223 Wylde upper on a PSA lower with enhanced mil spec guts) and put a $70 Primary Arms 3-9X44 on it. Now we're going to see how good of hits I can make at 200-400 yards.

"Running the gun hard(er)" is typically what'll expose problems with material, construct, or QA/QC. As fouling builds and lube starts to be consumed (and not replaced) - particularly if environmental dirt/debris also factors-in - we start to approach that edge where systems that are not optimized will start to exhibit problems and eventually fail.

The particulars of the ammo used as well as any other significant modifications can also drastically affect outcomes.

And there's also context - a from-the-manufacturer AR15 that's over-gassed may be horrible for someone who intends to slap a can on it for police CQB duty use, but for another shooter who may intend to use it for hobbyist plinking, with the absolute cheapest ammo that they can find, that setup can literally be ideal.

As for your specific gun, I think that with a good pairing on ammo - which I think is a crucial vetting point for *any* gun - it may surprise you as to its capabilities within the 400. I think you'll likely have an excellent day at the range with it. :)

Similarly, I think that as long as you kept it properly lubed, even a fast-paced, high-round-count class should not pose any issues, provided that there are no build concerns and that, materially speaking, the various components do not fall short of spec.

IMveryHO, someone who knows what they're doing and uses care in sourcing and collecting components can very well put together a budget AR15 that rivals any of the top-tier completes, even without specialized tools or gauging. But at the same time, to suggest that it's just LEGO or "parts are parts" is an oversimplification that is at-best demonstrative of a lack of knowledge, and at-worst can lead to a final assembly that is far from optimal.
 
"Running the gun hard(er)" is typically what'll expose problems with material, construct, or QA/QC. As fouling builds and lube starts to be consumed (and not replaced) - particularly if environmental dirt/debris also factors-in - we start to approach that edge where systems that are not optimized will start to exhibit problems and eventually fail.

The particulars of the ammo used as well as any other significant modifications can also drastically affect outcomes.

And there's also context - a from-the-manufacturer AR15 that's over-gassed may be horrible for someone who intends to slap a can on it for police CQB duty use, but for another shooter who may intend to use it for hobbyist plinking, with the absolute cheapest ammo that they can find, that setup can literally be ideal.

As for your specific gun, I think that with a good pairing on ammo - which I think is a crucial vetting point for *any* gun - it may surprise you as to its capabilities within the 400. I think you'll likely have an excellent day at the range with it. :)

Similarly, I think that as long as you kept it properly lubed, even a fast-paced, high-round-count class should not pose any issues, provided that there are no build concerns and that, materially speaking, the various components do not fall short of spec.

IMveryHO, someone who knows what they're doing and uses care in sourcing and collecting components can very well put together a budget AR15 that rivals any of the top-tier completes, even without specialized tools or gauging. But at the same time, to suggest that it's just LEGO or "parts are parts" is an oversimplification that is at-best demonstrative of a lack of knowledge, and at-worst can lead to a final assembly that is far from optimal.
True enough. But there is middle ground. And 90% of the people here could do anything they do with whatever AR they currently have with my $500 BCA 10.5" or my $800 Witch Doctor.

That said, I DO actually covet a $2000.00 Geiselle.
 
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.
Anyone have experience with that Geiselle? Saw one at my LGS and was talking to them about it the other day. Got me thinking. They’re not cheap, but one of the guys talked it up pretty good. And he’s a competition rifle shooter.
 
Anyone have experience with that Geiselle? Saw one at my LGS and was talking to them about it the other day. Got me thinking. They’re not cheap, but one of the guys talked it up pretty good. And he’s a competition rifle shooter.
I don't have one myself but I hear they are one of the best bangs for the buck when it comes to high end AR's.

My LGS sells them pretty regularly and they don't sit on the shelf long in these parts.

They have 2 in stock currently.

 
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I have often bought "blem" components for significant discounts on otherwise high-end parts just because of some minor finish issue. That's allowed me to build some platforms far cheaper, and at a higher level because of the discount.

Besides once the first round goes down range the whole firearm is a "blem".
 
I don't have one myself but I hear they are one of the best bangs for the buck when it comes to high end AR's.

My LGS sells them pretty regularly and they don't sit on the shelf long in these parts.

They have 2 in stock currently.

Looks nice!! The one at my LGS was marked up higher than that plus is has the 14.5” barrel with a pinned and welded muzzle device. Would want the 16” barrel so I could easily put a suppressor on it if I wanted that in the future.
 
Looks nice!! The one at my LGS was marked up higher than that plus is has the 14.5” barrel with a pinned and welded muzzle device. Would want the 16” barrel so I could easily put a suppressor on it if I wanted that in the future.

The guys at Northeast Munitions are awesome and I helped another member recently by referring him there for a Springfield Ronin that he was looking for and couldn't find elsewhere. They typically offer free shipping also.

I buy most of my firearms from them.
 
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